Isabella und Craig Hatkoff · Isabelle Hatkoff · told by Isabella Hatkoff
| title | ISBN-13 | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Alle lieben Knut | 978-3-89782-321-1 | 2008 | Juliana Hatkoff · Craig Hatkoff | |
| Kleines Nilpferd - große Freundschaft: Eine wahre Freundschaft | 978-3-7941-9119-2 | 2007 | Craig Hatkoff · Paula Kahumbu | |
| Knut, der kleine Eisbärenjunge | 978-3-473-55216-0 | 2007 | Juliana Hatkoff · Craig Hatkoff · Gerald R. Uhlich | |
| Knut: How One Little Polar Bear Captivated the World | 978-0-545-04716-6 | 2007 | Craig Hatkoff · Juliana Hatkoff · Dr. Gerald R. Uhlich | |
| Knut: La historia del osito polar que cautivó al mundo entero: | 978-0-545-05658-8 | 2007 | Juliana Hatkoff · Craig Hatkoff | |
| Knut: L'Ourson Polaire Qui Captiva Le Monde | 978-0-545-99216-9 | 2008 | Dr Gerald R Uhlich · Craig Hatkoff · Juliana Hatkoff | |
| Knut The Baby Polar Bear | 978-0-545-06157-5 | 2008 | Juliana Hatkoff | |
| Leo the Snow Leopard | 978-0-545-22927-2 | 2010 | Craig Hatkoff · Juliana Hatkoff | |
| Looking For Miza: The True Story of the Mountain Gorilla Family Who Rescued on of Their Own | 978-0-545-08540-3 | 2008 | Juliana Hatkoff · Craig Hatkoff · Dr. Paula Kahumbu | |
| Owen & Mzee Books | 978-0-545-11182-9 | 2009 | Craig Hatkoff · Paula Kahumbu | |
| Owen & Mzee: den sanna historien om en fantastisk vänskap | 978-91-32-15360-0 | 2008 | Craig Hatkoff · Paula Dr Kahumbu | |
| Owen & Mzee Doll Set | 978-1-57982-214-9 | Craig Hatkoff | ||
| Owen & Mzee: Language Of Friendship | 978-0-439-89959-8 | 2007 | Craig Hatkoff and Dr. Paula Kahumbu | |
| Owen & Mzee: The True Story of a Remarkable Friendship | 978-0-439-82973-1 | 2006 | Craig Hatkoff · Paula Kahumbu | |
| Owen and Mzee: A Day Together | 978-0-545-03766-2 | 2008 | Craig Hatkoff | |
| Owen and Mzee: Best Friends | 978-0-439-92872-4 | 2007 | Craig Hatkoff and Dr. Paula Kahumbu | |
| Owen y Mzee: La verdadera historia de una amistad increíble: | 978-0-545-03738-9 | 2008 | Craig Hatkoff | |
| Winter's Tail: How One Little Dolphin Learned to Swim Again | 978-0-545-34830-0 | 2011 | Craig Hatkoff · Juliana Hatkoff · David Yates | |
| Winter's Tail: How One Little Dolphin Learned To Swim Again | 978-0-545-12335-8 | 2009 | Juliana Hatkoff · Craig Hatkoff |
B Wahlströms · F.X. Schmid · Merrymakers Distribution · Ravensburger Buchverlag · Sauerländer · Scholastic