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- Leprechaun in late winter, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Pandas and other endangered species, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Midnight on the moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The knight at dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dolphins at daybreak, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, 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
- Soccer, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Mummies in the morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Viking ships at sunrise, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, Mary Pope Osborne ; cover art and interior illustrations, Sal Murdocca
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Horse heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Mummies and pyramids, a nonfiction companion to Mummies in the morning, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Stage fright on a summer night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Civil War on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A crazy day with cobras, Mary Pope Osborne
- Dogs in the dead of night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Winter of the ice wizard, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Revolutionary war on Wednesday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dog heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Una tarde en el Amazonas, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Hurry up, Houdini!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca.
- Abraham Lincoln, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Magic tricks from the tree house, an activity companion to magic tree house #50: hurry up, Houdini!, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Sea monsters, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Abe Lincoln at last!, Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Season of the sandstorms, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Snakes and other reptiles, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Tonight on the Titanic, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Haunted castle on Hallows Eve, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs before dark, 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
- Night of the new magicians, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, Mary Pope Osborne ; cover art and interior illustrations, Sal Murdocca
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Horse heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- A big day for baseball, by Mary Pope Osborne ; jacket illustration by Sal Murdocca ; interior illustrations by Ag Ford
- Mummies in the morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- Pandas and other endangered species, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca.
- Hurry up, Houdini!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Una tarde en el Amazonas, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Magic tricks from the tree house, an activity companion to magic tree house #50: hurry up, Houdini!, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Abe Lincoln at last!, Mary Pope Osborne ; illustrated by Sal Murdocca
- Haunted castle on Hallows Eve, 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
- Stallion by starlight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Heroes for all times, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Soccer on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Mummies in the morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- World at war, 1944, by Mary Pope Osborne ; illustrated by Sal Murdocca