| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Fließend in drei Monaten: Wie Sie in kürzester Zeit jede Sprache erlernen | 978-3-86882-611-1 | 2015 | |
| Fluent in 3 Months | 978-0-00-754392-2 | 2014 | |
| Fluent in 3 Months: How Anyone at Any Age Can Learn to Speak Any Language from Anywhere in the World | 978-0-06-228269-9 | 2014 | |
| LANGUAGE HACKING SPANISH : A Conversation Course for Beginners | 978-1-4736-3321-6 | 2016 |
HarperCollins · Teach Yourself · mvg Verlag