'Heart of a Lion' is a tale of extraordinary achievement and resilience that reads both like an adventure novel and a detective story. But the beauty of this book is that is hero is not a human, but North America's largest resident wild cat, the mountain lion. And the jounrey so vividly described and painstakingly documented by William Stolzenburg, working with a few dedicated mountain lion experts and other scientists, is one for the biological record books. This is a story of survival, a tale of how a big cat uses stealth, cunning and physical prowess to travel thousands of miles seeking others of its kind to settle new lands and seed future generations.