- Ancient Rome and Pompeii, a nonfiction companion to Vacation under the volcano, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Narwhal on a Sunny Night, Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house (Imagination Studio (Firm)), #41
- The final battle, Mary Pope Osborne
- Ghosts, a nonfiction companion to a good night for ghosts, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house, #1
- Osborne, Mary Pope, Magic tree house, #35
- Osborne, Mary Pope, Magic tree house, 1
- Osborne, Mary Pope, Merlin missions series, #24
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Twister on Tuesday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sirens and sea monsters, by Mary Pope Osborne ; with artwork by Troy Howell
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dragon of the red dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Earthquake in the early morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tree house: a big day for baseball, Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house series, #22
- Leonardo da Vinci, a nonfiction companion to Monday with a mad genius, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series
- Osborne, Mary Pope, Magic tree house series, #35
- Osborne, Mary Pope, Magic tree house, #2
- Osborne, Mary Pope, Magic tree house series, #25
- Osborne, Mary Pope, Merlin missions series, #4
- Llamas and the Andes, a nonfiction companion to Magic Tree House #34: late lunch with llamas.", by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre MoneĢs
- Osborne, Mary Pope, Magic tree house series, #14
- Memories and life lessons from the Magic tree house, Mary Pope Osborne ; with illustrations by Sal Murdocca
- The knight at dawn, Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house series, #17
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, #9
- High time for heroes, Mary Pope Osborne ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, #36
- Osborne, Mary Pope, Magic tree house series, #47
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A big day for baseball, by Mary Pope Osborne ; jacket illustration by Sal Murdocca ; interior illustrations by Ag Ford
- Osborne, Mary Pope, Merlin missions series, 13
- Time of the turtle king, by Mary Pope Osborne ; illustrated by AG Ford
- Tigers at twilight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Osborne, Mary Pope, Magic tree house series, #34
- American revolution, a nonfiction companion to Revolutionary War on Wednesday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Camp time in California, Mary Pope Osborne
- Osborne, Mary Pope, Magic tree house series, #42
- Pandas and other endangered species, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Magic tree house, Mary Pope Osborne, Books 29 & 30
- Osborne, Mary Pope, Magic tree house (Imagination Studio (Firm))
- Osborne, Mary Pope, Merlin missions series, #18
- Osborne, Mary Pope, Magic tree house series, #6
- Osborne, Mary Pope, Magic tree house (Imagination Studio (Firm)), #37