Ancient Greece and the Olympics: A Nonfiction Companion to Magic Tree House #16: Hour of the Olympics (Magic Tree House: Fact Trekker Book 10)

Hour of the Olympics (Magic Tree House Book 16)

Ancient Rome and Pompeii: A Nonfiction Companion to Magic Tree House #13: Vacation Under the Volcano (Magic Tree House (R) Fact Tracker)

China: Land of the Emperor's Great Wall: A Nonfiction Companion to Magic Tree House #14: Day of the Dragon King (Magic Tree House (R) Fact Tracker)

Civil War on Sunday (Magic Tree House Book 21)

Dolphins and Sharks: A Nonfiction Companion to Magic Tree House #9: Dolphins at Daybreak (Magic Tree House (R) Fact Tracker)

American Revolution (A Nonfiction Companion to Magic Tree House #22: Revolutionary War on Wednesday)

Space: A Nonfiction Companion to Magic Tree House #8: Midnight on the Moon (Magic Tree House (R) Fact Tracker)

Polar Bears and the Arctic: A Nonfiction Companion to Magic Tree House #12: Polar Bears Past Bedtime (Magic Tree House (R) Fact Tracker)

Knights and Castles: A Nonfiction Companion to Magic Tree House #2: The Knight at Dawn (Magic Tree House (R) Fact Tracker)