Polar bears and the Arctic a nonfiction companion to polar bears past bedtime

Series: Magic tree house fact trackers

• Dinosaurs: a nonfiction companion to Dinosaurs Before Dark (Volume 1.)

• Knights and castles: a nonfiction companion to the Knight at Dawn (Volume 2.)

• Mummies and pyramids: a nonfiction companion to Mummies in the morning (Volume 3.)

• Pirates: a nonfiction companion to Pirates Past Noon (Volume 4.)

• Rain forests: a nonfiction companion to Afternoon on the Amazon (Volume 5.)

• Space (Volume 6.)

• Titanic: a nonfiction companion to Tonight on the Titanic (Volume 7.)

• Twisters and other terrible storms: a nonfiction companion to Twister on Tuesday (Volume 8.)

• Dolphins and sharks: a nonfiction companion to Dolphins at Daybreak (Volume 9.)

• Ancient Greece and the Olympics: a nonfiction companion to Hour of the Olympics (Volume 10.)

• American revolution: a nonfiction companion to Revolutionary War on Wednesday (Volume 11.)

• Sabertooths and the ice age: a nonfiction companion to Sunset of the Sabertooth (Volume 12.)

• Pilgrims: a nonfiction companion to Thanksgiving on Thursday (Volume 13.)

• Ancient Rome and Pompeii: a nonfiction companion to Vacation under the volcano (Volume 14.)

• Tsunamis and other natural disasters: a nonfiction companion to High tide in Hawaii (Volume 15.)

• Polar bears and the Arctic: a nonfiction companion to polar bears past bedtime (Volume 16.)

• Sea monsters (Volume 17.)

• Penguins and Antarctica: a nonfiction companion to Eve of the emperor penguins (Volume 18.)

• Leonardo da Vinci: a nonfiction companion to Monday with a mad genius (Volume 19.)

• Ghosts: a nonfiction companion to a Good Night for Ghosts (Volume 20.)

• Leprechauns and Irish folklore: a nonfiction companion to Leprechaun in late winter (Volume 21.)

• Rags and riches: kids in the time of Charles Dickens (Volume 22.)

• Dog heroes: a nonfiction companion to Magic Tree House #46: Dogs in the dead of night (Volume 24.)

• Abraham Lincoln: a nonfiction companion to Magic Tree House #47: Abe Lincoln at Last! (Volume 25.)

• Pandas and other endangered species (Volume 26.)

• Horse heroes (Volume 27.)

• Heroes for all times: a nonfiction companion to Magic Tree House #51: High time for heroes (Volume 28.)

• Soccer: a nonfiction companion to Magic Tree House #52: Soccer on Sunday (Volume 29.)

• Ninjas and samurai (Volume 30.)

• China: land of the emperor's Great Wall (Volume 31.)

• Sharks and other predators (Volume 32.)

• Vikings (Volume 33.)

• Dogsledding and extreme sports: a nonfiction companion to Magic tree house #54, Balto and the blue dawn (Volume 34.)

• Dragons and mythical creatures (Volume 35.)

• World War II (Volume 36.)

• Baseball (Volume 37.)

• Wild West (Volume 38.)

• Benjamin Franklin (Volume 41.)

• Narwhals and other whales: a nonfiction companion to Magic Tree House #33: Narwhal on a Sunny Night