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- Season of the sandstorms, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs before dark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Earthquake in the early morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hurry up, Houdini!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A good night for ghosts, Mary Pope Osborne ; illustrated by Sal Murdocca
- Stage fright on a summer night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Danger in the darkest hour, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dark day in the deep sea, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dogs in the dead of night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dolphins and sharks, a nonfiction companion to Dolphins at daybreak, by 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 perfect time for pandas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Haunted castle on Hallows Eve, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the Ninjas, 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
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Rain forests, a nonfiction companion to Afternoon on the Amazon, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Day of the Dragon King, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Vacation under the volcano, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, 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
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sunset of the sabertooth, by Mary Pope Osborne ; 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
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Viking ships at sunrise, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the new magicians, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The knight at dawn, by 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
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sea Monsters, a nonfiction companion to dark day in the deep sea, 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
- Mummies in the morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- Monday with a mad genius, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Space, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Leprechaun in late winter, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Abe Lincoln at last!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Pirates, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Season of the sandstorms, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs before dark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Earthquake in the early morning, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hurry up, Houdini!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A good night for ghosts, Mary Pope Osborne ; illustrated by Sal Murdocca
- Danger in the darkest hour, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dark day in the deep sea, by Mary Pope Osborne ; illustrated by Sal Murdocca
- 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
- A perfect time for pandas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Haunted castle on Hallows Eve, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the Ninjas, 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
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Rain forests, a nonfiction companion to Afternoon on the Amazon, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Carnival at candlelight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Vacation under the volcano, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, 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
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Buffalo before breakfast, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Viking ships at sunrise, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Night of the new magicians, by 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
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sea Monsters, a nonfiction companion to dark day in the deep sea, 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
- Mummies in the morning, Mary Pope Osborne ; illustrated by Sal Murdocca
- Monday with a mad genius, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Space, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Leprechaun in late winter, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Abe Lincoln at last!, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Soccer, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Soccer on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Tonight on the Titanic, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Midnight on the moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dragon of the red dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca