Mary Pope Osborne Magic Tree House Collection 16-Book Set Exciting Adventure & Mystery Books for Kids | Best-Selling Fantasy Series Epic Fantasy Mattie soon realises that a

Mattie soon realises that a masked killer is picking off Chris

Horton Hears a Who

The Naughtiest Unicorn on a School Trip

armed with his own special set of secret gadgets

Mary Pope Osborne Magic Tree House Collection 16-Book Set Exciting Adventure & Mystery Books for Kids | Best-Selling Fantasy Series Epic Fantasy Mattie soon realises that aTitles In this Set: Valley of the Dinosaurs Castle of Mystery Secret of the Pyramid Pirates' Treasure! Night of the Ninjas Adventure on the Amazon Mammoth to the Rescue Moon Misson Diving with Dolphins A Wild West Ride Lions on the Loose Icy Escape Racing with Gladiators Palace of the Dragon King Voyage of the Vikings Olympic Challenge