- Twister on Tuesday, Mary Pope Osborne
- Texas, a nonfiction companion to Magic Tree House #30: Hurricane heroes in Texas, Mary Pope Osborne, Natalie Pope Boyce ; illustrated by Isidre Mones
- Dinosaurs before dark, Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- 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
- Fourteen days, a literary project of the Authors Guild of America, edited by Margaret Atwood and Douglas Preston
- Danger in the darkest hour, Mary Pope Osborne
- Fourteen days, a collaborative novel; The Authors Guild of America, Margaret Atwood and Douglas Preston
- Narwhal on a sunny night, by Mary Pope Osborne
- Dragons and mythical creatures, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- Dinosaurs before dark, Mary Pope Osborne
- Midnight on the moon, Mary Pope Osborne
- Late lunch with llamas, by Mary Pope Osborne
- Christmas in Camelot, by Mary Pope Osborne
- Tonight on the Titanic, 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
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, Mary Pope Osborne
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Earthquake in the early morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A big day for baseball, Mary Pope Osborne
- Sunlight on the snow leopard, Mary Pope Osborne
- Fourteen days, a literary project of the Authors Guild of America, edited by Margaret Atwood and Douglas Preston
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, Mary Pope Osborne ; illustrated by Sal Murdocca
- Warriors in winter, by Mary Pope Osborne ; illustrated by AG Ford
- Mummies in the morning, by Mary Pope Osborne
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Camp time in California, by Mary Pope Osborne
- Titanic, a nonfiction companion to Tonight on the Titanic, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Sunset of the sabertooth, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Rhinos at recess, Mary Pope Osborne
- Sunlight on the snow leopard, by Mary Pope Osborne ; illustrated by AG Ford
- Vacation under the volcano, Mary Pope Osborne
- To the future, Ben Franklin!, by Mary Pope Osborne ; illustrated by AG Ford
- Narwhal on a sunny night, 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
- Warriors in winter, by Mary Pope Osborne
- Dogs in the dead of night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Camp time in California, by Mary Pope Osborne ; illustrated by AG Ford
- American tall tales, by Mary Pope Osborne ; wood engravings by Michael McCurdy
- Pirates past noon, by Mary Pope Osborne
- Time of the turtle king, Mary Pope Osborne
- Night of the Ninjas, by Mary Pope Osborne
- Time of the turtle king, by Mary Pope Osborne ; illustrated by AG Ford