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

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

Dolphins at Daybreak (Magic Tree House Book 9)

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

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

Earthquake in the Early Morning (Magic Tree House Book 24)

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

Shadow of the Shark (Magic Tree House Book 53)

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