- Magic Tree House Research Guide #10: Ancient Greece and the Olympics: A Nonfiction Companion to Hour of the Olympics
- Magic Tree House Research Guide #12: Sabertooths and the Ice Age: A Nonfiction Companion to Sunset of the Sabertooth
- Magic Tree House Research Guide #13: Pilgrims: A Nonfiction Companion to Thanksgiving on Thursday
- Magic Tree House Research Guide #15: Tsunamis and Other Natural Disasters: A Nonfiction Companion to High Tide in Hawaii
- Magic Tree House Research Guide #16: Polar Bears and the Arctic: A Nonfiction Companion to Polar Bears Past Bedtime
- Magic Tree House Research Guide #17: Sea Monsters: A Nonfiction Companion to Dark Day in the Deep Sea
- Magic Tree House Research Guide #19: Leonardo da Vinci: A Nonfiction Companion to Monday with a Mad Genius
- Magic Tree House Research Guide #2: Knights and Castles: A Nonfiction Companion to The Knight at Dawn
- Magic Tree House Research Guide #4: Pirates: A Nonfiction Companion to Pirates Past Noon
- Magic Tree House Research Guide #5: Rain Forests: A Nonfiction Companion to Afternoon on the Amazon
- Magic Tree House Research Guide #7: Titanic: A Nonfiction Companion to Tonight on the Titanic
- MAGIC TREE HOUSE RESEARCH GUIDE(ANCIENT ROME AND POMPEII)
- MAGIC TREE HOUSE RESEARCH GUIDE(PILGRIMS)
- MAGIC TREE HOUSE RESEARCH GUIDE(RAIN FORESTS)
- MAGIC TREE HOUSE RESEARCH GUIDE(SPACE)
- MAGIC TREE HOUSE RESEARCH GUIDE(TITANIC)
- MAGIC TREE HOUSE RESEARCH GUIDE(TSUNAMIS)
- MAGIC TREE HOUSE RESEARCH GUIDE(TWISTERS AND OTHER TERRIBLE STORMS)
- Magic Tree House Volumes 17 20: The Mystery of the Enchanted Dog
- Magic Tree House Volumes 21 24 Boxed Set: American History Quartet
- Magic Tree House Volumes 25 28 Boxed Set
- MAGIC TREE HOUSE(BOOKS13-16共4册)
- MAGIC TREE HOUSE(BOOKS17-20共4册)
- MAGIC TREE HOUSE(BOOKS21-24共4册)
- MAGIC TREE HOUSE(MERLIN MISSIONS BOOKS1-4共4册)
- MAGIC TREEHOUSE(BOOKS25-28共4册)
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