- The 91-story treehouse, Andy Griffiths ; illustrated by Terry Denton
- Summer of the sea serpent, Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Mummies in the morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Earthquake in the early morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dolphins at daybreak, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, Mary Pope Osborne
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Late lunch with llamas, Mary Pope Osborne
- Dinosaurs before dark, Mary Pope Osborne
- Domino's tree house, written by Dawn Patitucci ; illustrated by Francisco Fonseca
- Tigers at twilight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs before dark, Mary Pope Osborne ; illustrated by Sal Murdocca
- The 39-story treehouse, Andy Griffiths ; illustrated by Terry Denton
- Day of the Dragon King, Mary Pope Osborne
- The 143-story treehouse, Andy Griffiths ; illustrated by Terry Denton
- The better tree fort, Jessica Scott Kerrin ; pictures by Qin Leng
- Hurry up, Houdini!, 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
- Dinosaurs before dark, adapted by Jenny Laird ; with art by Kelly and Nichole Matthews
- Twister on Tuesday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The 26-story treehouse, Andy Griffiths ; illustrated by Terry Denton
- Eve of the Emperor penguin, by Mary Pope Osborne ; [illustrations by Sal Murdocca]
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Civil War on Sunday, [Mary Pope Osborne ; illustrated by Sal Murdocca]
- Maggie & Abby and the shipwreck treehouse, Will Taylor
- Vacation under the volcano, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The great treehouse war, Lisa Graff
- Hurricane heroes in Texas, by Mary Pope Osborne ; illustrated by AG Ford
- Day of the Dragon King, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, Mary Pope Osborne
- Narwhal on a Sunny Night, Mary Pope Osborne
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, 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
- The knight at dawn, Mary Pope Osborne
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The knight at dawn, the graphic novel, adapted by Jenny Laird ; with art by Kelly & Matthews
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Stage fright on a summer night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Warriors in winter, by Mary Pope Osborne ; illustrated by AG Ford
- High time for heroes, Mary Pope Osborne ; illustrated by Sal Murdocca
- Mummies in the morning, by Mary Pope Osborne
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The far-out fort, Mike Petrik