1995 - Secrets From the Past [Books for World Explorers] (Hardcover) ISBN-13: 9780870443169 ISBN-10: 087044316X Genre: Children's Books 2 1991 - Towns Down Underground [Young Explorers] (Hardcover) ISBN-13: 9780870448461 ISBN-10: 0870448463 Genre: Children's Books ? 1986 - Nature on the Rampage Our VIolent Earth (Hardcover) → Hardcover ISBN-13: 9780870445873 ISBN-10: 0870445871 Genre: Science & Math 4 1974 - Three Little Indians [Books for Young Explorers] (Hardcover) → Hardcover ISBN-13: 9780870441578 ISBN-10: 0870441574 Genre: Children's Books 3 |