Renowned explorer and adventurer Rick Ridgeway takes us on a walk, a five-hundred-kilometer trek from the icy summit of Mr. Kilimanjaro across the famed Tsavo parks of Kenya to the shores of the Indian Ocean. Here is a rare and thrilling view, as Ridgeway and his party find themselves eyeball to eyeball with lion and buffalo, elephant and crocodile. But Ridgeway has more in mind than sheer adventure. The Tsavo has, in recent years, become a critical...