MARY POPE OSBORNE and NATALIE POPE BOYCE are sisters who grew up on army posts all over the world. Mary is the author of more than 50 acclaimed books for children. Natalie has worked as a children's librarian and as a teacher of English and E.S.L.
Books 1 and 2 of the New York Times bestselling Magic Tree House series!
Dinosaurs Before Dark: Where did the tree house come from? Before Jack and Annie can find out, the mysterious tree house whisks them to the prehistoric...[SEE MORE]