- 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
- Titanic :, a nonfiction companion to Tonight on the Titanic, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Dragon of the red dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ancient Rome and Pompeii :, a nonfiction companion to Vacation under the volcano, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Heroes for all times :, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Leonardo da Vinci :, a nonfiction companion to Monday with a mad genius, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Delfines al amanecer, Mary Pope Osborne ; ilustrado por Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dog heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Abraham Lincoln, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Space :, a nonfiction companion to Midnight on the moon, by Will Osborne and Mary Pope Osborne ; illlustrated by Sal Murdocca
- Viking ships at sunrise, 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
- Winter of the ice wizard, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Tigers at twilight, 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
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Season of the sandstorms, 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
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- American revolution :, a nonfiction companion to Revolutionary War on Wednesday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Dark day in the deep sea, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Civil War on Sunday, [Mary Pope Osborne ; illustrated by Sal Murdocca]
- Atardecer en el pueblo fantasma, Mary Pope Osborne ; illustrated by Sal Murdocca
- Sabertooths and the ice age :, a nonfiction companion to Magic tree house #7: Sunset of the sabertooth, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hurry up, Houdini!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Piratas después del mediodía, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Pilgrims, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Penguins :, Eve of the Emperor penguin ; Penguins and Antarctica : a nonfiction companion to Eve of the Emperor penguins, Sal Murdocca
- Knights and castles :, a nonfiction companion to The knight at dawn, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Double trouble in Walla Walla, by Andrew Clements ; illustrated by Sal Murdocca
- El caballero del alba, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Dinosaurs before dark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Danger in the darkest hour, Mary Pope Osborne
- Pirates :, Pirates past noon ; Pirates : a nonfiction companion to Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca ; Will Osborne
- Tonight on the Titanic, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A perfect time for pandas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Mummies :, Mummies in the morning ; Mummies and pyramids : a nonfiction companion to Mummies in the morning, by Mary Pope Osborne ; illustrated by Sal Murdocca ; Will Osborne
- Soccer :, Soccer on Sunday ; Soccer : a nonfiction companion to Soccer on Sunday, Mary Pope Osborne ; Natalie Pope Boyce
- Pirates :, a nonfiction companion to Pirates past noon, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the Ninjas, by Mary Pope Osborne ; illustrated by Sal Murdocca