From New York Times bestselling author Fern Forgettable comes the epic finale to Fern's School for Wayward Fae, where a demifae girl faces her biggest battle yet when she must rescue one of the school's own from evil forces before it's too late. A girl who's trapped in another realm. Her school, full of the peculiarly magical. And a fight for the fate of the world. In the calm before the storm, Rosemary and her friends have survived their first battle with the treacherous Seelie Keeper. But though their beloved Fern's School for Wayward Fae remains no worse for wear, the Seelie Keeper came away with a bitter victory: one of the school's very own students has been kidnapped. To save her classmate and put a stop to the Seelie Keeper, Rosemary must prepare for outright war. Can all of the fae finally put aside their differences for the fate of the realms? Or will Fern's School finally fall to the hands of evil?.