Dinosaurs: A Nonfiction Companion to Magic Tree House #1: Dinosaurs Before Dark (Magic Tree House: Fact Trekker)

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

Pirates: A Nonfiction Companion to Magic Tree House #4: Pirates Past Noon (Magic Tree House (R) Fact Tracker)

Mummies and Pyramids: A Nonfiction Companion to Magic Tree House #3: Mummies in the Morning (Magic Tree House (R) Fact Tracker)

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

Ninjas and Samurai: A Nonfiction Companion to Magic Tree House #5: Night of the Ninjas (Magic Tree House (R) Fact Tracker)

Dinosaurs Before Dark (Magic Tree House Book 1)

Sabertooths and the Ice Age: A Nonfiction Companion to Magic Tree House #7: Sunset of the Sabertooth (Magic Tree House (R) Fact Tracker)

Rain Forests: A Nonfiction Companion to Magic Tree House #6: Afternoon on the Amazon (Magic Tree House (R) Fact Tracker)

Vikings: A Nonfiction Companion to Magic Tree House #15: Viking Ships at Sunrise (Magic Tree House (R) Fact Tracker)

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