- Danger in the darkest hour, by Mary Pope Osborne ; illustrated by Sal Murdocca
- World at war, 1944, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A big day for baseball, by Mary Pope Osborne ; illustration by Sal Murdocca ; interior illustrations by AG Ford
- Summer of the sea serpent, Mary Pope Osborne ; illustrated by Sal Murdocca
- Twister on Tuesday, Mary Pope Osborne
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Pirates, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Pandas and other endangered species, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Carnival at Candlelight, Mary Pope Osborne
- Abraham Lincoln, Natalie Pope Boyce
- Tigers at Twilight, Mary Pope Osborne
- Earthquake in the Early Morning, Mary Pope Osborne
- Day of the Dragon King, Mary Pope Osborne
- Ancient Rome and Pompeii, Natalie Pope Boyce
- Ancient Rome and Pompeii, a nonfiction companion to Vacation under the volcano, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Eve of the Emperor penguin, by Mary Pope Osborne ; [illustrations by Sal Murdocca]
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the Blue Moon, Mary Pope Osborne
- Danger in the darkest hour, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Leonardo da Vinci, Natalie Pope Boyce
- Mummies in the morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- Civil War on Sunday, Mary Pope Osborne
- Penguins and Antarctica, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Summer of the Sea Serpent, Mary Pope Osborne
- Pilgrims, Natalie Pope Boyce
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, 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
- A Perfect Time for Pandas, Mary Pope Osborne
- Night of the Ninjas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Good morning, gorillas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- The Landry News, Andrew Clements ; illustrations by Salvatore Murdocca
- Dinosaurs before dark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sunset of the sabertooth, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ninjas and samurai, a nonfiction companion to Magic tree house #5 : Night of the ninjas, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Civil War on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A Crazy Day with Cobras, Mary Pope Osborne
- American revolution, a nonfiction companion to Revolutionary War on Wednesday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Sabertooths and the ice age, a nonfiction companion to Sunset of the sabertooth, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Polar Bears and the Arctic, Natalie Pope Boyce
- Danger in the Darkest Hour, Mary Pope Osborne
- Vacation Under the Volcano, Mary Pope Osborne
- Magic tree house incredible fact book, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Blizzard of the blue moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ghosts, "A nonfiction companion to Magic Tree House #42: A Good Night for Ghosts.", by Natalie Pope Boyce ; illustrated by Sal Murdocca
- Space, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Midnight on the moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A good night for ghosts, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dark day in the deep sea, by Mary Pope Osborne ; illustrated by Sal Murdocca