| year of publication | ISBN | author(s) | title |
| 1998 | 978-0-06-039240-6 | Annie Gottlieb | A Return to Innocence: Philosophical Guidance in an Age of Cynicism |
| 1997 | 978-0-06-039241-3 | Barry Sears | Zone Perfect Meals in Minutes: 150 Fast and Simple Healthy Recipes from the Bestselling Authorof the Zone and Mastering the Zone |
| 1998 | 978-0-06-039242-0 | Barry, Ph.D. Sears | Zone Food Blocks: The Quick and Easy, Mix-and-Match Counter for Staying in the Zone |
| 1999 | 978-0-06-039243-7 | Barry Sears | Anti-Aging Zone |
| 2002 | 978-0-06-039245-1 | Michael Moore | Stupid White Men ...and Other Sorry Excuses for the State of the Nation! |
| 1997 | 978-0-06-039246-8 | Linda Fisher | The Muffin Lady: Muffins, Cupcakes, and Quickbreads for the Happy Soul |
| 1998 | 978-0-06-039248-2 | Sarah Dunant | Transgressions |
| '' | 978-0-06-039249-9 | Richard L Brown | The 10-Minute L.E.A.P.: Lifetime Exercise Adherence Plan |
| 2000 | 978-0-06-039250-5 | Douglas Coupland | Generation X: Tales for an Accelerated Culture |
| 1998 | 978-0-06-039251-2 | Nicole Cooley | Judy Garland, Ginger Love |
| '' | 978-0-06-039254-3 | Oz Garcia | The Balance: Balancing Your Body to Achieve Ideal Weight, High Energy, and Optimal Health |
| '' | 978-0-06-039258-1 | Marilyn Manson · Neil Strauss | The Long Hard Road Out of Hell |
| 1999 | 978-0-06-039262-8 | Juliano Brotman · Erika Lenkert | Raw: The Uncook Book: New Vegetarian Food for Life |
| '' | 978-0-06-039265-9 | Bruce Goldstein | Puppy Chow Is Better Than Prozac: The True Story About a Man and the Puppy Who Saved His Life |
| 1999 | 978-0-06-039266-6 | Marilu Henner · Ruth Velikovsky Sharon | I Refuse to Raise a Brat: Straightforward Advice on Parenting in an Age of Overindulgence |
| 2000 | 978-0-06-039268-0 | Vivienne Tam | China Chic |
| 1998 | 978-0-06-039269-7 | Bertram Fields | Royal Blood: Richard III and the Mystery of the Princes |
| '' | 978-0-06-039270-3 | Chin-ning Chu | Do Less, Achieve More: Discover the Hidden Power of Giving In |
| 1999 | 978-0-06-039273-4 | Karen Ramsey | Everything You Know About Money Is Wrong: Overcome the Financial Myths Keeping You from the Life You Want |
| '' | 978-0-06-039274-1 | Tony Perrone | Dr. Tony Perrone's Body-Fat Breakthru: 10 Personalized Plans for Mega-Health |
| 2000 | 978-0-06-039276-5 | Robert M. Alter · Jane Alter · Harville Hendrix | The Transformative Power of Crisis: Our Journey to Psychological Healing and Spiritual Awakening |
| '' | 978-0-06-039280-2 | Wally Lamb | I Know This Much Is True |
| 1999 | 978-0-06-039282-6 | Gregory Maguire | Confessions of an Ugly Stepsister |
| '' | 978-0-06-039283-3 | M.d., Barrie Sanford Greiff | Legacy: The Giving of Life's Greatest Treasures |
| 1999 | 978-0-06-039287-1 | Patricia Payne | Sex Tips from a Dominatrix |
| 2001 | 978-0-06-039288-8 | Tommy Lee · Vince Neil · Motley Crue · Mick Mars · Nikki Sixx · Neil Strauss (contributor) | The Dirt: Confessions of the World's Most Notorious Rock Band |
| 2000 | 978-0-06-039289-5 | Liz Gordon · Terri Hartman | Decorative Hardware: Interior Designing With Knobs, Handles, Latches, Locks, Hinges, and Other Hardware |
| 1999 | 978-0-06-039291-8 | Marilu Henner · Laura Morton | The 30 Day Total Health Makeover: Everything You Need To Do To Change Your Body, Your Health and Your Life in 30 Days |
| '' | 978-0-06-039292-5 | Anistatia R. Miller · Jared Brown · Don Gatterdam | Champagne Cocktails: Includes recipes, quotes, lore, and a directory of the world's poshest lounges |
| '' | 978-0-06-039293-2 | Meat Loaf · Meatloaf · David Dalton | To Hell and Back: An Autobiography |
| 2000 | 978-0-06-039295-6 | Peter Berley | The Modern Vegetarian Kitchen |
| '' | 978-0-06-039296-3 | Waller Randy Newell | What is a Man? |
| 2009 | 978-0-06-039297-0 | Barry Sears | The Zone Life Plan: 30 Days to a Complete Life Change |
| 2000 | 978-0-06-039298-7 | The Rock · Joe Layden | The Rock Says... |
| 1999 | 978-0-06-039299-4 | Mick Foley | Mankind: Have a Nice Day - A Tale of Blood and Sweatsocks |
| 2001 | 978-0-06-039300-7 | Mick Foley | Foley Is Good: And the Real World Is Faker Than Wrestling |
| '' | 978-0-06-039301-4 | Lara Webb Carrigan | The Best Friend's Guide to Planning a Wedding: How to Find a Dress, Return the Shoes, Hire a Caterer, Fire the Photographer, Choose a Florist, Book a Band, and Still Wind Up Married at the End of It All |
| 2002 | 978-0-06-039302-1 | '' | The Best Friend's Guide to Planning a Wedding: How to Find a Dress, Return the Shoes, Hire a Caterer, Fire the Photographer, Choose a Florist, Book a Band, ... Still Wind Up Married at the End of It All |
| 1999 | 978-0-06-039303-8 | Bill Plympton · Anonymous | Monica's Untold Story: An Amorality Tale |
| 2000 | 978-0-06-039308-3 | Danielle Kwatinetz Wood | The UnCollege Alternative: Your Guide to Incredible Careers and Amazing Adventures Outside College |
| 2000 | 978-0-06-039310-6 | Barry Sears PhD | The Soy Zone |
| 2004 | 978-0-06-039311-3 | Barry Sears | Zone Meals in Seconds: 150 Fast and Delicious Recipes for Breakfast, Lunch, and Dinner |
| 2002 | 978-0-06-039313-7 | '' | The Omega Rx Zone: The Miracle of the New High-Dose Fish Oil |
| 1999 | 978-0-06-039314-4 | George Anastasia | The Summer Wind: Thomas Capano and the Murder of Anne Marie Fahey |
| 2001 | 978-0-06-039315-1 | Jan Greye · Gail Jesse Smith | Puppy Parenting: Everything You Need to Know About Your Puppy's First Year |
| 2000 | 978-0-06-039319-9 | Rachel Ashwell | The Shabby Chic Home |
| '' | 978-0-06-039320-5 | Anna Maxted | Getting Over It: A Novel |
| 2001 | 978-0-06-039321-2 | Anna Maxted | Running in Heels: A Novel |
| 2003 | 978-0-06-039322-9 | Patrick Mcgilligan | Alfred Hitchcock: A Life in Darkness and Light |
| 2001 | 978-0-06-039323-6 | Victoria Granof | Sweet Sicily: The Story of an Island and Her Pastries |
| '' | 978-0-06-039324-3 | M.d., Emile Hiesiger · Kathleen Brady | Your Pain Is Real: Free Yourself from Chronic Pain with Breakthrough Medical Treatments |
| 2000 | 978-0-06-039325-0 | James D. Murphy | Business Is Combat: A Fighter Pilot's Guide to Winning in Modern Business Warfare |
| '' | 978-0-06-039326-7 | Robyn Cosio | The Eyebrow |
| 2001 | 978-0-06-039327-4 | Kurt Angle | It's True! It's True! |
| '' | 978-0-06-039329-8 | Chyna · Michael Angeli | If They Only Knew |
| 2000 | 978-0-06-039331-1 | Arianna Huffington | How to Overthrow the Government |
| 2000 | 978-0-06-039334-2 | Alyce Faye Cleese · Brian Bates | How to Manage Your Mother: Understanding the Most Difficult, Complicated, and Fascinating Relationship in Your Life |
| '' | 978-0-06-039335-9 | Lauren Hutton · Deborah Kotz | The Slim-Fast Body, Mind, Life Makeover |
| '' | 978-0-06-039340-3 | Peggy Noonan | The Case Against Hillary Clinton |
| '' | 978-0-06-039341-0 | Suzanne Frutig Bales | A Garden of Fragrance |
| '' | 978-0-06-039345-8 | Gordon Churchwell | Expecting: One Man's Uncensored Memoir of Pregnancy |
| 2001 | 978-0-06-039346-5 | Shmuley Boteach | Why Can't I Fall in Love? A 12-Step Program |
| 2003 | 978-0-06-039347-2 | Shmuley Boteach | The Private Adam: Becoming a Hero in a Selfish Age |
| 2008 | 978-0-06-039349-6 | Wally Lamb | The Hour I First Believed: A Novel |
| 2002 | 978-0-06-039355-7 | Jeffrey M. Schwartz · Sharon Begley | The Mind and the Brain: Neuroplasticity and the Power of Mental Force |
| 2002 | 978-0-06-039363-2 | Marilu Henner | Healthy Holidays: Total Health Entertaining All Year Round |
| 2000 | 978-0-06-039364-9 | '' | Healthy Life Kitchen |
| 2008 | 978-0-06-039365-6 | '' | Wear Your Life Well: Use What You Have to Get What You Want |
| '' | 978-0-06-039366-3 | Barry Sears | The Zone: A Dietary Road Map to Lose Weight Permanently: Reset Your Generic Code: Prevent Disease: Achieve Maximum Physical Performance |
| 2000 | 978-0-06-039367-0 | Calif.) Rolling Stone (San Francisco | Hothouse |
| 2004 | 978-0-06-039368-7 | Dave Navarro · Neil Strauss | Don't Try This at Home: A Year in the Life of Dave Navarro |
| 2001 | 978-0-06-039369-4 | Eddie Muller | Dark City Dames: The Wicked Women of Film Noir |
| '' | 978-0-06-039374-8 | Roma Downey | Love Is a Family |
| 2000 | 978-0-06-039376-2 | Anna Maxted | Getting Over it |
| '' | 978-0-06-039378-6 | Jim "j.r." Ross | CAN YOU TAKE THE HEAT?: The WWF Is Cooking! |
| 2001 | 978-0-06-039379-3 | David Heber | What Color Is Your Diet?: The 7 Colors of Health |
| '' | 978-0-06-039382-3 | Gregory Maguire | Lost: A Novel |
| 2000 | 978-0-06-039383-0 | Liz Sheridan | Dizzy & Jimmy: My Life with James Dean: A Love Story |
| 2003 | 978-0-06-039384-7 | Gregory Maguire | Mirror Mirror: A Novel |
| 2001 | 978-0-06-039386-1 | Jess Walter | Over Tumbled Graves |
| 2001 | 978-0-06-039387-8 | Jr., Basil V. Devito · Joe Layden · Wwf | WWF WrestleMania: The Official Insider's Story |
| 2006 | 978-0-06-039388-5 | Roger Friedland · Harold Zellman | The Fellowship: The Untold Story of Frank Lloyd Wright and the Taliesin Fellowship |
| 2001 | 978-0-06-039390-8 | Carolyn Mein | Different Bodies, Different Diets: Introducing the Revolutionary 25 Body Type System |
| 2002 | 978-0-06-039392-2 | Kenneth W. Christian | Your Own Worst Enemy: Breaking the Habit of Adult Underachievement |
| 2001 | 978-0-06-039393-9 | F J Lennon | Every Mistake in the Book: A Business How-NOT-To |
| 2000 | 978-0-06-039394-6 | Patricia Greenberg | Soy Desserts: Fresh, Fun, & Fabulously Healthy Recipes |
| '' | 978-0-06-039396-0 | Fina Torres · Vera Blasi | Woman on Top: A Sexy, Delicious Fairy Tale |
| 2002 | 978-0-06-039397-7 | Lillian Ellison | The Fabulous Moolah: First Goddess of the Squared Circle |
| 2001 | 978-0-06-039401-1 | Rachel Ashwell | The Shabby Chic Gift of Giving |
| '' | 978-0-06-039403-5 | Kellina Stewart | Pilates for Beginners |
| '' | 978-0-06-039405-9 | National Hot Rod Association | The Fast Lane: The History of NHRA Drag Racing |
| '' | 978-0-06-039406-6 | Toni Weschler | Taking Charge of Your Fertility: The Definitive Guide to Natural Birth Control, Pregnancy Achievement, and Reproductive Health (Revised Edition) |
| 2001 | 978-0-06-039407-3 | Lou Michel · Dan Herbeck | American Terrorist: Timothy McVeigh and the Oklahoma City Bombing |
| '' | 978-0-06-039408-0 | Oz Garcia · Sharyn Kolberg | Oz Garcia's The Healthy High-Tech Body |
| '' | 978-0-06-039411-0 | Bill Gaston | The Good Body: A Novel |
| '' | 978-0-06-039413-4 | Caroline Rose Hunt | Primrose Past: The 1848 Journal of Young Lady Primrose |
| 2000 | 978-0-06-039414-1 | Mick Foley | Mick Foley's Christmas Chaos |
| 2001 | 978-0-06-039415-8 | Tristan Taormino | Pucker Up: A Hands-On Guide to Ecstatic Sex |
| 2002 | 978-0-06-039418-9 | David Henry Sterry | Chicken: Self-Portrait of a Young Man for Rent |
| 2001 | 978-0-06-039419-6 | Barry Sears | The Top 100 Zone Foods: The Zone Food Science Ranking System |
| '' | 978-0-06-039422-6 | Frederick Wirth | Prenatal Parenting: The Complete Psychological and Spiritual Guide to Loving Your Unborn Child |
| 2001 | 978-0-06-039427-1 | Andrew Witten · Michael White | Dondi White Style Master General: The Life of Graffiti Artist Dondi White |
| '' | 978-0-06-039428-8 | Midge Decter | An Old Wife's Tale: My Seven Decades in Love and War |
| '' | 978-0-06-039430-1 | Nancy E. Turner | The Water and the Blood: A Novel |
| 2002 | 978-0-06-039431-8 | Jay Williams · Debra Fulghum Bruce | The 24-Hour Turnaround: The Formula for Permanent Weight Loss, Antiaging, and Optimal Health--Starting Today |
| 2001 | 978-0-06-039433-2 | Joe Meno | How the Hula Girl Sings: A Novel |
| 2004 | 978-0-06-039435-6 | Joel Lobenthal | Tallulah!: The Life and Times of a Leading Lady |
| 2002 | 978-0-06-039436-3 | Sela Ward | Homesick: A Memoir |
| '' | 978-0-06-039437-0 | Bo Derek | Riding Lessons: Everything That Matters in Life I Learned from Horses |
| 2003 | 978-0-06-039439-4 | Jess Walter | Land of the Blind: A Novel |
| 2005 | 978-0-06-039441-7 | Jess Walter | Citizen Vince: A Novel |
| 2004 | 978-0-06-039442-4 | Kelly Wearstler | Modern Glamour: The Art of Unexpected Style |
| 2002 | 978-0-06-039444-8 | Alan Cumming | Tommy's Tale: A Novel |
| 2001 | 978-0-06-039445-5 | Mario Puzo | The Family: A Novel |
| 1977 | 978-0-06-040136-8 | M. Glenn Abernathy | Civil liberties under the Constitution |
| 1991 | 978-0-06-040138-2 | Janet L. Abu-Lughod | Changing Cities: Urban Sociology |
| 1970 | 978-0-06-040161-0 | Forman S. Acton | Numerical Methods That Work |
| 1987 | 978-0-06-040163-4 | Rodolfo Acuna | Occupied America: A History of Chicanos |
| 1978 | 978-0-06-040164-1 | Sam Adams · etc. | Teaching Mathematics: With Emphasis on the Diagnostic Approach |
| 1968 | 978-0-06-040165-8 | Wallace E. Adams | Western World (To 1700) |
| '' | 978-0-06-040166-5 | '' | Western World (From 1700) |
| 1989 | 978-0-06-040167-2 | Jonathan R. Adelman · Deborah Anne Palmieri | The Dynamics of Soviet Foreign Policy |
| 1994 | 978-0-06-040168-9 | Peter D. Adams · Amy Tickle | The Harpercollins Concise Handbook for Writers |
| 1981 | 978-0-06-040169-6 | Leslie J. Ades | Increasing Your Sales Potential: A Practical Guide to Successful Selling |
| 1979 | 978-0-06-040172-6 | Warren K. Agee · etc. | Introduction to Mass Communications |
| 1982 | 978-0-06-040173-3 | Warren K. Agee | Reporting and Writing the News |
| '' | 978-0-06-040174-0 | Warren K. Agee · etc. | Perspectives on Mass Communications |
| '' | 978-0-06-040175-7 | '' | Introduction to Mass Communications |
| 1986 | 978-0-06-040176-4 | Dennis L. Wilcox · etc. | Public Relations: Strategies and Tactics |
| '' | 978-0-06-040178-8 | Warren K. Agee · etc. | Main Currents in Mass Communications |
| 1988 | 978-0-06-040181-8 | '' | Introduction to Mass Communications |
| 1991 | 978-0-06-040182-5 | Warren K. Agee | Introduction to Mass Communication |
| 1988 | 978-0-06-040185-6 | Warren K. Agee · Edwin Emery | Maincurrents in Mass Communications |
| 1974 | 978-0-06-040205-1 | Thomas L. Allen · Raymond M. Keefer | Chemistry: Experiment and Theory |
| 1977 | 978-0-06-040206-8 | Richard K. Allen | Organizational Management Through Communication |
| 1977 | 978-0-06-040207-5 | Robert D. Allen | Science of Life |
| 1982 | 978-0-06-040209-9 | Thomas L Allen | Chemistry, experiment and theory |
| 1998 | 978-0-06-040211-2 | Allen | Sol MN Chem Exper Theory 2e |
| 1985 | 978-0-06-040212-9 | Michel Albert | Effective Management: Readings, Cases and Experiences |
| 1988 | 978-0-06-040215-0 | Michael Albert | Effective Management: Readings, Cases and Experiences |
| 1985 | 978-0-06-040222-8 | Jose Almeida · Stephen Mohler · Robert R. Stinson | Descubrir Y Crear |
| 1998 | 978-0-06-040223-5 | Almeida | Wk LM Descubrir Crear |
| 1981 | 978-0-06-040224-2 | Jose Almeida | Descubrir y crear (Spanish Edition) |
| 1976 | 978-0-06-040228-0 | José Almeida · Stephen C. Mohler · Robert R. Stinson | Descubrir y crear (Spanish Edition) |
| '' | 978-0-06-040231-0 | Cuaderno De Ejercicios Para Descubrir Y Crear |
| 1978 | 978-0-06-040232-7 | Lawrence R. Allman · Dennis T. Jaffe | Abnormal Psychology in the Life Cycle |
| 1990 | 978-0-06-040239-6 | Clela Allphin-Hoggatt · Shirley Larue Mann | Good News for Writers: A College Reader |
| 1977 | 978-0-06-040246-4 | Alan A Altshuler | The politics of the Federal bureaucracy |
| 1975 | 978-0-06-040262-4 | James E Anderson | Texas politics: An introduction |
| 1979 | 978-0-06-040263-1 | James E Anderson | Texas politics: An introduction |
| 1984 | 978-0-06-040264-8 | '' | Texas politics: An introduction |
| 1971 | 978-0-06-040267-9 | James E Anderson | Texas politics: an introduction |
| 1988 | 978-0-06-040268-6 | '' | Texas politics: An introduction |
| 1972 | 978-0-06-040276-1 | Marian H Anderson | Play with a purpose;: Elementary school physical education, kindergarten through grade eight (Harper's school and public health education, physical education, and recreation series) |
| 1998 | 978-0-06-040277-8 | Anderson | DM Educational Psychology PB |
| 1990 | 978-0-06-040281-5 | Robert Lee Anderson · John S. Dunkelberg | Entrepreneurship: Starting a New Business |
| 1973 | 978-0-06-040291-4 | James Robertson Andrews | Choice of Worlds Pap |
| 1991 | 978-0-06-040293-8 | Larry C. Andrews | Introduction to Differential Equations With Boundary Value Problems |
| 1994 | 978-0-06-040294-5 | Elliot Aronson · Timothy D. Wilson · Robin M. Akert | Social Psychology: The Heart and the Mind |
| 1960 | 978-0-06-040310-2 | Mauree. Applegate | Easy in English: An Imaginative Approach to the Teaching of the Language Arts. |
| 1980 | 978-0-06-040321-8 | Jack Arbuthnot · David Faust | Tchg Moral Reas Theory Prac 80 |
| 1976 | 978-0-06-040324-9 | G. C. Archibald | An Introduction to Mathematical Economics: Methods and Applications |
| 1987 | 978-0-06-040332-4 | Helen Joseph Armstrong | Pattern Making for Fashion Design |
| 1988 | 978-0-06-040341-6 | William E. Arnold · Lynne McClure | Communication Training and Development |
| 1990 | 978-0-06-040351-5 | Parviz Asheghian · Bahman Ebrahimi | International Business: Economics, Environment, and Strategies |
| 1986 | 978-0-06-040361-4 | Robert Atwan · Bruce Forer | Why We Write: A Thematic Reader |
| 1987 | 978-0-06-040362-1 | Robert Atwan | Writing Day by Day: 101 Complete Short Essays |
| 1979 | 978-0-06-040394-2 | Study Guide and Problems: Lipsey/Sparks/Steiner Economics |
| 1977 | 978-0-06-040396-6 | Michael J. Austin | Delivering Human Services: An Introductory Programmed Text (Harper Series in Social Work) |
| 1974 | 978-0-06-040398-0 | Charlotte J. Avers | Evolution |
| 1975 | 978-0-06-040399-7 | June, and Levin, Herman Axinn | Social welfare: a history of the American response to need |
| 1982 | 978-0-06-040403-1 | June Axinn | Social welfare: A history of the American response to need |
| 1981 | 978-0-06-040404-8 | James A. Stegenga | The Global Community: A Brief Introduction to International Relations |
| 1990 | 978-0-06-040436-9 | Marshall W. Gregory | The Harper & Row Reader: Liberal Education Through Reading and Writing |
| 1989 | 978-0-06-040438-3 | Lloyd S. Baird · James E. Post · John F. Mahon | Management: Functions and Responsibilities |
| 1985 | 978-0-06-040439-0 | Sheridan Baker | Practical Stylist |
| '' | 978-0-06-040441-3 | Sheridan Warner Baker | The Essayist |
| 1984 | 978-0-06-040442-0 | Sheridan Baker | Complete Stylist and Handbook |
| 1972 | 978-0-06-040443-7 | Howard M Bahr | Native Americans today: sociological perspectives, |
| 1986 | 978-0-06-040444-4 | Sheridan Baker | Practical Stylist: With Readings |
| 1979 | 978-0-06-040446-8 | Larry P Bailey | Contemporary auditing |
| 1990 | 978-0-06-040447-5 | Lloyd Baird · etc. · et al | Management: Students Handbook: Functions and Responsibilities |
| 1972 | 978-0-06-040448-2 | Robert D. Baird · Alfred Bloom | Religion and Man: Indian and Far Eastren Religious Traditions |
| 1977 | 978-0-06-040449-9 | John E. Baird | The Dynamics of Organizational Communication |
| 1991 | 978-0-06-040452-9 | Sheridan Warner Baker · Robert E. Yarber | Practical Stylist With Readings |
| 1981 | 978-0-06-040453-6 | Sheridan Warner Baker | The essayist |
| 1980 | 978-0-06-040455-0 | Northrop Frye · Sheridan Baker · George Perkins | The Practical imagination: Stories, poems, plays |
| 1978 | 978-0-06-040456-7 | Sheridan Warner Baker | On the sentence |
| 1981 | 978-0-06-040457-4 | John E Baird | Speaking for results: Communication by objectives |
| 1982 | 978-0-06-040458-1 | Constantine A. Balanis | Antenna Theory: Analysis and Design (Harper & Row Series in Electrical Engineering) |
| '' | 978-0-06-040461-1 | Sheridan Warner Baker | The practical stylist with readings |
| 1985 | 978-0-06-040463-5 | Robert A. Bartkowiak | Electric Circuit Analysis |
| 1987 | 978-0-06-040466-6 | Sheridan Baker · Ken Ledbetter · Lawrence B. Gamache | The Canadian Practical Stylist With Readings |
| 1991 | 978-0-06-040472-7 | Terence Ball · Richard Dagger | Ideals and Ideologies: A Reader |
| '' | 978-0-06-040473-4 | Terence Ball · Richard Dagger | Political Ideologies and the Democratic Ideal |