In the fifth and final book of the Fairyland series, September has become the Queen of Fairyland, but she finds the role a lonely and constricting prison. When a mysterious key appears and unlocks all the magic doors of Fairyland at once, September embarks on one last, wild race across the entire kingdom to reclaim her true self and decide Fairyland's future. Alongside her loyal friends—A-Through-L the Wyverary, Saturday the Marid, and Blunderbuss the combat wombat—she faces riddles, revolutions, and the very nature of stories themselves. This breathtaking conclusion asks what it truly means to grow up and whether you must leave wonder behind to do so.