"The Forgotten Door" is a children's fantasy novel written by Alexandre Dumas. The story follows a young boy named Peter who discovers a mysterious door in the woods. This door leads to a magical world filled with adventure and strange creatures. As Peter explores this new realm, he learns important lessons about bravery, friendship, and the power of imagination. The narrative emphasizes the importance of curiosity and the idea that there is always more to discover beyond the ordinary. The book encourages readers to embrace their sense of wonder and explore the unknown.