The enchanted island of yew

Three young girls wander into an enchanted forest at meet a fairy woman, who is bored with her perfect, immortal life. She convinces them to turn her into a human and decides to become a prince because boys have more fun. His/her new existence exploring the surrounding kingdoms is fast and adventurous from the get-go. What unfolds in an interesting story of problems solved by a woman's mind in the luxury of a man's body. 'The Enchanted Island of Yew' (1903) was written by L. Frank Baum, the author of 'The Wonderful Wizard of Oz', but is separate from the Oz series. This story clearly comes from the same imagination, however, with the added bonus of some interesting gender-bender elements.