The Wee Free Men is a fantasy novel written by Terry Pratchett. The story revolves around Tiffany Aching, a young girl with red hair who discovers that she has a natural talent for witchcraft. With the help of a group of tiny, rowdy, and mischievous fairies known as the Nac Mac Feegle, Tiffany embarks on a quest to save her brother and protect her homeland from an ancient evil. The book combines humor, adventure, and themes of bravery and self-discovery, making it a delightful read for girls with red hair.