Two books in one: Caves (non-fiction) What are caves? How do they form? What types are there? What animals live in them? These and other questions are answered by this interesting reader who, with the help of beautiful photos and illustrations, takes us into the mysterious underground world of caves. The Lucky Accident (fiction) David and Ruth are camping with their cousins, Sarah and Joe. They decide to play hide and seek, and David thinks he has found a great hiding place between two rocks. This is actually the entrance to a cave and David is about to make a big discovery!