"The Magic Tree House" is a popular children's book series written by Mary Pope Osborne. The story follows siblings Jack and Annie who discover a magical tree house filled with books. Each book transports them to different times and places, allowing them to experience adventures in history, science, and mythology. Throughout their journeys, Jack and Annie learn valuable lessons and gather information to solve problems. The series encourages a love for reading and exploration, making it a favorite among young readers. With over 30 titles, the books are designed for children aged 6 to 9, blending education with entertainment.