Dolfje is a popular children's book character created by Dutch author Paul van Loon. The story follows a young boy named Dolfje who discovers that he is a werewolf. Each full moon, he transforms into a wolf, leading to various adventures and challenges as he learns to navigate his dual identity. The series explores themes of friendship, acceptance, and the struggles of growing up. Dolfje's adventures are filled with humor and excitement, making the books appealing to young readers. The character has become a beloved figure in Dutch literature, inspiring adaptations in theater and other media.