- Magic tree house, Mary Pope Osborne, Books 25-29
- The land of the dead, by Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house series, #53
- Winter of the ice wizard, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears and the Arctic, a nonfiction companion to polar bears past bedtime, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The knight at dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Standing in the light, the captive diary of Catherine Carey Logan, Delaware Valley, Pennsylvania, 1763, by Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house series, #20
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, #21
- Magic tree house, Mary Pope Osborne, Book 36 & 37
- Time of the turtle king, by Mary Pope Osborne ; illustrated by AG Ford
- Osborne, Mary Pope, Magic tree house series, #5
- Soccer, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, 15
- Dark day in the deep sea, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sharks and other predators, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- 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
- Osborne, Mary Pope, Magic tree house series, #27
- Vikings, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- Osborne, Mary Pope, Magic tree house series, #33
- Snakes and other reptiles, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, #28
- A big day for baseball, by Mary Pope Osborne ; jacket illustration by Sal Murdocca ; interior illustrations by Ag Ford
- Warriors, a nonfiction companion to Magic tree house #31: Warriors in Winter, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre Monés
- Osborne, Mary Pope, Magic tree house series, #16