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- Monday with a mad genius, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Titanic, a nonfiction companion to Magic Tree House #17 : Tonight on the Titanic, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Hour of the Olympics, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Viking ships at sunrise, by Mary Pope Osborne ; illustrated by Sal Murdocca
- El verano de la serpiente marina, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Thanksgiving on Thursday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Polar bears past bedtime, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tricks from the tree house, a fun companion to Magic Tree House Merlin Mission #22 : hurry up, Houdini!, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- El invierno del hechicero del hielo, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Stallion by starlight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Christmas in Camelot, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Abe Lincoln at last!, Mary Pope Osborne ; illustrated by Sal Murdocca
- Pirates past noon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dolphins at daybreak, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Carnaval a media luz, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Night of the ninth dragon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- La estación de las tormentas de arena, Ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Una momia al amanecer, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Leprechauns and Irish folklore, a nonfiction companion to Leprechaun in late winter, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Night of the Ninjas, by Mary Pope Osborne ; illustrated by Sal Murdocca
- A ghost tale for Christmas time, by Mary Pope Osborne ; illustrated by Sal Murdocca
- La noche de los ninjas, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Dinosaurs before dark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Civil War on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dinosaurs, a nonfiction companion to "Dinosaurs before dark", by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- A big day for baseball, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Navidad en Camelot, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- American revolution, a nonfiction companion to Revolutionary War on Wednesday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Tigers at twilight, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Balto of the Blue Dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- The knight at dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Ghost town at sundown, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Piratas después del mediodía, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Dinosaurios al atardecer, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducción, Marcela Brovelli
- Jueves de Acción de Gracias, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Knights and castles, a nonfiction companion to The knight at dawn, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Delfines al amanecer, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Space, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Leones a la hora del almuerzo, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrations by Sal Murdocca
- Magic tree house incredible fact book, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Stage fright on a summer night, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Sunset of the sabertooth, by Mary Pope Osborne ; illustrated by Sal Murdocca
- High tide in Hawaii, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Cuento de fantasmas para la Navidad, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Afternoon on the Amazon, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- El día del Rey Dragón, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Monday with a mad genius, by Mary Pope Osborne ; illustrated by Sal Murdocca
- El verano de la serpiente marina, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Magic tricks from the tree house, a fun companion to Magic Tree House Merlin Mission #22 : hurry up, Houdini!, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- El invierno del hechicero del hielo, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Una momia al amanecer, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- La estación de las tormentas de arena, Ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Carnaval a media luz, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- A big day for baseball, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Shadow of the shark, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Navidad en Camelot, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- American revolution, a nonfiction companion to Revolutionary War on Wednesday, 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
- Dinosaurios al atardecer, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducción, Marcela Brovelli
- Eve of the Emperor penguin, by Mary Pope Osborne ; illustrations by Sal Murdocca
- Cuento de fantasmas para la Navidad, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Magic tree house incredible fact book, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Memories and life lessons from the Magic tree house, Mary Pope Osborne ; with illustrations by Sal Murdocca
- Magic tree house survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Un castillo embrujado en la noche de Halloween, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Maremoto en Hawái, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- 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
- Dark day in the deep sea, 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
- A crazy day with cobras, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Dragon of the red dawn, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Miedo escénico en una noche de verano, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Buenos días, gorilas, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- World at war, 1944, Mary Pope Osborne ; illustrated by Sal Murdocca
- High time for heroes, Mary Pope Osborne ; illustrated by Sal Murdocca
- Soccer, a nonfiction companion to Magic Tree House #52: Soccer on Sunday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Heroes for all times /, A Nonfiction Companion to Magic Tree House #51: High Time for Heroes, by Mary Pope Osborne and Natalie Pope Boyce ; 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
- La noche de los nuevos magos, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli
- Moonlight on the magic flute, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic Tree House survival guide, Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Soccer on Sunday, by Mary Pope Osborne ; illustrated by Sal Murdocca
- Luz de luna sobre la flauta mágica, Mary Pope Osborne ; ilustrado por Sal Murdocca ; traducido por Marcela Brovelli