The Magic Tree House Merlin Missions Books 1-25 Boxed Set by Mary Pope Osborne is a collection of juvenile fiction books that combine elements of historical, fantasy, and action genres. Published by Random House Children’s Books in 2017, this set includes 27 books in the series, perfect for young readers who enjoy imaginative stories filled with magic and adventure. With a compact size of 7.7 x 5.2 x 9.2 inches and weighing 98.2 ounces, this box set offers a convenient way for children to delve into a captivating world created by the talented author.