- Magic Tree House survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- A big day for baseball, Mary Pope Osborne
- Magic tree house incredible fact book, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Magic tree house collection, Mary Pope Osborne, Books 1-8
- Merlin missions collection, Mary Pope Osborne, Books 9-16
- Earthquake in the early morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- World War II, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- Dinosaurs before dark, Mary Pope Osborne ; illustrated by Sal Murdocca
- Hurricane heroes in Texas, by Mary Pope Osborne
- Revolutionary War on Wednesday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Good morning, gorillas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Late lunch with llamas, by Mary Pope Osborne ; illustrated by AG Ford
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Merlin missions collection, Mary Pope Osborne, Books 17-24
- Narwhal on a sunny night, by Mary Pope Osborne
- Midnight on the moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Vacation under the volcano, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ninjas and samurai, a nonfiction companion to Magic tree house #5 : Night of the ninjas, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Hurricane heroes in Texas, by Mary Pope Osborne ; illustrated by AG Ford
- Texas, a nonfiction companion to Magic Tree House #30: Hurricane heroes in Texas, Mary Pope Osborne, Natalie Pope Boyce ; illustrated by Isidre Mones
- Warriors in winter, Mary Pope Osborne
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Merlin missions collection, Mary Pope Osborne, Books 1-8
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Late lunch with llamas, by Mary Pope Osborne
- Sunset of the sabertooth, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Llamas and the Andes, late lunch with llamas, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre Monés
- Titanic, a nonfiction companion to Tonight on the Titanic, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Camp time in California, by Mary Pope Osborne
- To the future, Ben Franklin!, by Mary Pope Osborne ; illustrated by AG Ford
- Dogsledding and extreme sports, a nonfiction companion to Magic tree house #54, Balto of the Blue Dawn, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- Narwhal on a sunny night, by Mary Pope Osborne ; illustrated by AG Ford
- Camp time in California, by Mary Pope Osborne ; illustrated by AG Ford
- High time for heroes, Mary Pope Osborne ; illustrated by Sal Murdocca
- Warriors in winter, by Mary Pope Osborne ; illustrated by AG Ford
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Thanksgiving on Thursday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Narwhals and other whales, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre Mon©♭s
- A big day for baseball, by Mary Pope Osborne ; jacket illustration by Sal Murdocca ; interior illustrations by Ag Ford