In a bittersweet blend of science and yarn, Carter Niemeyer takes us back to 1996 on a heart-pounding, eye-witness adventure to add ten more wolves­–the Sawtooth pups–to Yellowstone’s newly reintroduced wolf packs. So much could go wrong. So much did go wrong. But in the end, the other ten wolves helped change the character of Yellowstone’s wolf packs forever.