- Heroes for all times :, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Thanksgiving ;, Thanksgiving on Thursday ; Pilgrims : a nonfiction companion to Thanksgiving on Thursday, Mary Pope Osborne ; Natalie Pope Boyce
- Midnight on the moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dragon of the red dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Viking ships at sunrise, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Tigers at twilight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Snakes and other reptiles :, a nonfiction companion to A crazy day with cobras, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Twisters and other terrible storms :, a nonfiction companion to Twister on Tuesday, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Season of the sandstorms, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Delfines al amanecer, Mary Pope Osborne ; ilustrado por Sal Murdocca
- Space :, a nonfiction companion to Midnight on the moon, by Will Osborne and Mary Pope Osborne ; illlustrated by Sal Murdocca
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Winter of the ice wizard, 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
- Abraham Lincoln, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Dog heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Double trouble in Walla Walla, by Andrew Clements ; illustrated by Sal Murdocca
- Penguins :, Eve of the Emperor penguin ; Penguins and Antarctica : a nonfiction companion to Eve of the Emperor penguins, Sal Murdocca
- Tonight on the Titanic, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Pilgrims, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A perfect time for pandas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sunset of the sabertooth, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ancient Greece and the Olympics :, a nonfiction companion to Hour of the Olympics, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dingoes at dinnertime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, 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
- Thanksgiving on Thursday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dolphins and sharks :, a nonfiction companion to Magic tree house #9 : Dolphins at daybreak, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- La noche de los ninjas, Mary Pope Osborne ; ilustrado por Sal Murdocca
- Knights :, The knight at dawn ; Knights and castles : a nonfiction companion to The knight at dawn, by Mary Pope Osborne ; Will Osborne ; illustrated by Sal Murdocca
- Revolutionary War on Wednesday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tricks from the tree house :, a fun companion to Magic Tree House #50 : hurry up, Houdini!, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Un tigre dientes de sable en el ocaso, Mary Pope Osborne ; ilustrado por Sal Murdocca
- Mummies and pyramids :, a nonfiction companion to Mummies in the morning, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Soccer on Sunday, Mary Pope Osborne ; illustrated by Sal Mardocca
- High time for heroes, Mary Pope Osborne ; cover art and interior illustrations, Sal Murdocca
- Mummies in the morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, Mary Pope Osborne
- Penguins and Antarctica :, a nonfiction companion to Eve of the emperor penguins, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Titanic :, Tonight on the Titanic ; Titanic : a nonfiction companion to Tonight on the Titanic, by Mary Pope Osborne ; Will Osborne ; illustrated by Sal Murdocca