Owen, a baby hippo and Mzee, a giant Aldabran tortoise, stroll at the Haller Park in the Kenyan coastal city of Mombasa, June 2, 2006. "Owen and Mzee," by author Craig Hatkoff, is a true story of hope and resilience and chronicles the incredible friendship formed between the two from 2004. The book was released in New York earlier this year and is already a number one best seller and is available in English, French, German, Spanish, Chinese, Japanese and Russian, with Arabic and Hebrew versions well under way. Picture taken June 2, 2006. REUTERS/Antony Njuguna (KENYA)