| title | ISBN-13 | year of publication |
|---|
| Easy German Step-by-Step | 978-0-07-184047-7 | 2014 |
| Easy German Step-by-Step, Second Edition | 978-1-260-45516-8 | 2019 |
| English Verb Drills | 978-0-07-160870-1 | 2009 |
| English Verbs & Essentials of Grammar for ESL Learners | 978-0-07-163229-4 | 2009 |
| ESL DeMYSTiFieD | 978-0-07-182077-6 | 2013 |
| Essential German Verb Skills | 978-0-07-145388-2 | 2005 |
| German Conversation Demystified with Two Audio CDs | 978-0-07-162722-1 | 2009 |
| German Demystified: A Self Teaching Guide | 978-0-07-147561-7 | 2007 |
| German Demystified, Premium 3rd Edition | 978-1-259-83637-4 | 2016 |
| German DeMYSTiFieD, Second Edition | 978-0-07-175588-7 | 2011 |
| German Grammar Drills | 978-0-07-178945-5 | 2012 |
| German Grammar Drills | 978-0-07-147514-3 | 2007 |
| German Grammar Drills, Third Edition | 978-1-260-11625-0 | 2018 |
| Practice Makes Perfect: Complete English All-in-One for ESL Learners | 978-1-260-45524-3 | 2019 |
| Practice Makes Perfect Complete German All-in-One | 978-1-260-45514-4 | 2019 |
| Practice Makes Perfect Complete German Grammar | 978-0-07-176360-8 | 2011 |
| Practice Makes Perfect: Complete German Grammar, Premium Second Edition | 978-1-260-12165-0 | 2018 |
| Practice Makes Perfect English Grammar for ESL Learners, 2nd Edition: With 100 Exercises | 978-0-07-180737-1 | 2013 |
| Practice Makes Perfect: English Grammar for ESL Learners | 978-0-07-144132-2 | 2004 |
| Practice Makes Perfect: English Grammar for ESL Learners, Third Edition | 978-1-260-12093-6 | 2018 |
| Practice Makes Perfect English Problem Solver: With 110 Exercises | 978-0-07-179124-3 | 2013 |
| Practice Makes Perfect: English Pronouns and Prepositions | 978-0-07-144775-1 | 2005 |
| Practice Makes Perfect English Pronouns and Prepositions, Second Edition | 978-0-07-175387-6 | 2011 |
| Practice Makes Perfect English Sentence Builder | 978-0-07-159960-3 | 2009 |
| Practice Makes Perfect English Sentence Builder, Second Edition | 978-1-260-01923-0 | 2017 |
| Practice Makes Perfect: German Conversation | 978-0-07-177091-0 | 2012 |
| Practice Makes Perfect German Problem Solver: With 130 Exercises | 978-0-07-179115-1 | 2013 |
| Practice Makes Perfect: German Pronouns and Prepositions | 978-0-07-145392-9 | 2006 |
| Practice Makes Perfect German Pronouns and Prepositions, Second Edition | 978-0-07-175383-8 | 2011 |
| Practice Makes Perfect German Sentence Builder | 978-1-260-01912-4 | 2017 |
| Practice Makes Perfect German Sentence Builder | 978-0-07-159962-7 | 2009 |
| Practice Makes Perfect German Vocabulary | 978-0-07-176301-1 | 2011 |
| Practice Makes Perfect: German Vocabulary | 978-0-07-148285-1 | 2007 |
| Practice Makes Perfect Intermediate German Grammar | 978-0-07-180477-6 | 2013 |
| Writing Better English: An ESL Workbook | 978-0-07-142643-5 | 2004 |
| Writing Better English for ESL Learners, Second Edition | 978-0-07-162803-7 | 2009 |