| title | media type | | ISBN-13 | year of publica-
tion |
|---|
| ConZentrate: Get Focused and Pay Attention--When Life Is Filled with Pressures, Distractions, and Multiple Priorities | Paperback | | 978-0-312-27010-0 | 2001 |
| ConZentrate: Get Focused and Pay Attention--When Life Is Filled with Pressures, Distractions, and Multiple Priorities | Hardcover | | 978-0-312-19847-3 | 2000 |
| Crisp: Concentration!: How to Focus for Success | Paperback | | 978-1-56052-073-3 | 1991 |
| Konzentration. Mit gesteigertem Aufnahme- und Erinnerungsvermögen zum Erfolg | Broschiert | | 978-3-8323-0019-7 | 1996 |
| POP!: Create the Perfect Pitch, Title, and Tagline for Anything | Paperback | | 978-0-399-53361-7 | 2009 |
| POP!: Stand Out in Any Crowd | Hardcover | | 978-0-399-53276-4 | 2006 |
| Take the Bully by the Horns: Stop Unethical, Uncooperative, or Unpleasant People from Running and Ruining Your Life | Paperback | | 978-0-312-32022-5 | 2003 |
| Take the Bully by the Horns: Stop Unethical, Uncooperative, or Unpleasant People from Running and Ruining Your Life | Hardcover | | 978-0-312-27820-5 | 2002 |
| Tongue Fu! At School: 30 Ways to Get Along with Teachers, Principals, Students, and Parents | Paperback | | 978-1-58979-106-0 | 2004 |
| Tongue Fu!: How to Deflect, Disarm, and Defuse Any Verbal Conflict | " | | 978-0-312-15227-7 | 1997 |
| Tongue Fu / Sozlu Dovus Sanati | Taschenbuch | | 978-975-7004-02-8 | 1997 |
| What's Holding You Back?: 30 Days to Having the Courage and Confidence to Do What You Want, Meet Whom You Want, and Go Where You Want | Paperback | | 978-0-312-25440-7 | 2000 |