The Magic Tree House Books 1-28 Boxed Set by Mary Pope Osborne is a collection of 28 illustrated novels for young readers, featuring the adventures of siblings Jack and Annie as they travel through time and around the world. Published by Random House Children's Books in 2008, these chapter books are filled with fantasy and magic, as well as action and adventure. Brand new boxed set.Each novel is 144 pages long and offers a captivating story with illustrations to bring the adventures to life.