. Richardson and Parnell base this book on a true story about two male Chinstrap penguins, Roy and Silo, who are a couple at the Central Park Zoo in New York City. A zookeeper notices that the two male penguins built a nest together and were trying to hatch a rock. They become surrogate parents to an egg the zookeeper gives them from a female who had two eggs and would only care for one. The egg hatches, and they are a family. I chose this book because I thought that it is absurd that people challenge