Mary Osborne

Magic Tree House #11

Mary Osborne, Sal Murdocca, 等

Moonhorse

Mary Osborne, Sm Saelig, 等

Tales From The Odyssey

Mary Osborne

Magic Tree House #12: Polar Bears Past Bedtime

Mary Osborne, Sal Murdocca, 等

Magic Tree House #7: Sunset of the Sabertooth

Mary Osborne, Sal Murdocca, 等

Magic Tree House #27:Thanksgiving on Thursday

Mary Osborne, Sal Murdocca, 等

Magic Tree House (1-4)

Mary Osborne

Pirates Past Noon

Mary Osborne

Dinosaurs Before Dark

Mary Osborne

The Knight at Dawn

Mary Osborne

The Knight at Dawn

Mary Osborne

Favorite Greek Myths

Mary Osborne, Troy Howell, 等

New York's Bravest

Mary Osborne, Steve Johnson, 等

Haunted Castle on Hallows Eve

Mary Osborne, Sal Murdocca, 等

Magic Tree House #26

Mary Osborne, Sal Murdocca, 等

Mummies & Pyramids

Mary Osborne, Sal Murdocca, 等

Sabertooths and the Ice Age

Mary Osborne, Sal Murdocca, 等

Magic Tree House Research Guide #10

Mary Osborne, Sal Murdocca, 等

Dolphins and Sharks

Mary Osborne, Sal Murdocca, 等

Pirates Past Noon

Mary Osborne, Sal Murdocca, 等

Mummies in the Morning

Mary Osborne, Sal Murdocca, 等

The Knight at Dawn

Mary Osborne, Sal Murdocca, 等

Dinosaurs Before Dark

Mary Osborne, Sal Murdocca, 等

Afternoon on the Amazon

Mary Osborne, Sal Murdocca, 等