| title | media type | ISBN-13 | year of publication | |
|---|---|---|---|---|
| Die goldenen Türme | Gebunden | 978-3-473-34739-1 | 2009 | |
| La sfida. Roar: 1 | Copertina rigida | 978-88-04-58764-4 | 2009 | |
| The Roar | Paperback | 978-0-439-92785-7 | 2012 | |
| The Roar | Hardcover | 978-0-439-92593-8 | 2009 | |
| The Roar | Paperback | 978-1-905294-63-3 | 2008 | |
| The Whisper | " | 978-1-905294-89-3 | 2015 | |
| The Whisper | " | 978-0-545-32311-6 | 2014 | |
| The Whisper | Hardcover | 978-0-545-31772-6 | 2012 |
Chicken House · Mondadori · Ravensburger Buchverlag · Scholastic