Some people collect coins, some people collect books; people like Eric Dinerstein collect sightings of rare species. In The Kingdom of Rarities, newly released in paperback, Dinerstein shares stories from his career spent traveling the world in search of Andean cocks-of-the-rock, armadillos, and saolas. As he travels, he shares stories of how these species affect the ecosystems they live in and how scientists are working to learn more about them and how they can be protected.