Ghosts - Magic Tree House Research Guide Author:Mary Pope Osborne, Natalie Pope Boyce FOR USE IN SCHOOLS AND LIBRARIES ONLY. What are the origins of some of the famous ghost stories in Louisiana? Why do people believe in ghosts? Do most cultures have some kind of ghost stories? Find out the answers to these questions and more in Magic Tree House Research Guide: Ghosts, Jack and Annie's guide to ghost stories from all over the world.