The Magic Tree House Merlin Missions Books 1-8 Set by Mary Pope Osborne is a collection of softcover books published by Random House Children's Books. This series is part of the Magic Tree House series, known for its blend of historical and fantasy elements, as well as action and adventure. Each book in the set contains 144 pages and is written in English, making it accessible and engaging for young readers. The set includes books 1-8 in the series, providing a captivating narrative experience for children interested in magic and adventure.