Magic Tree House is a children's book series based on fantasy and historical fiction. *This set includes the following 4 books: *The corners are damaged, especially the cover and back cover of volume 36, and there are folded pages. Also, they are slightly discolored due to age. (Please check the attached images for details) Volume 36 Blizzard of the Blue Moon Volume 38 Monday with a Mad Genius Volume 39 Dark Day in the Deep Sea Volume 40 Eve of the Emperor Penguin Thank you for viewing.