Author: Will Osborne

Mary Pope Osborne & Will Osborne: Dinosaurs

Mary Pope Osborne: Knights and Castles

Mary Pope Osborne: Mummies and Pyramids

Mary Pope Osborne: Pirates

Mary Pope Osborne: Rain Forests

Mary Pope Osborne & Will Osborne: Space

Mary Pope Osborne & Will Osborne: Titanic

Mary Pope Osborne: Twisters and Other Terrible Storms

Mary Pope Osborne & Will Osborne: Magic Tree House Fact & Fiction: Dinosaurs

Mary Pope Osborne & Will Osborne: Magic Tree House Fact & Fiction: Ghosts

Mary Pope Osborne & Will Osborne: Magic Tree House Fact & Fiction: Mummies

Mary Pope Osborne & Will Osborne: Magic Tree House Fact & Fiction: Ninjas

Mary Pope Osborne & Will Osborne: Magic Tree House Fact & Fiction: Pirates