Bestselling author Brian D. McLaren followed his love of nature (specifically, tortoises) all the way to the Galapagos Islands. There, he paid close attention to the flora and fauna around him but also to what was happening within him, how the natural world awakened his soul in a way that organized religion could not. McLaren's descriptions of birds and reptiles, fish and flowers sing; he walks in the footsteps of Charles Darwin and grieves that...