This is not your average trip to Fairyland

In Selkie's family, you don't celebrate birthdays. You don't talk about birthdays. And you never, ever reveal your birth date.

On her seventeenth birthday, Selkie finally understands why. All she wanted was a simple "Happy Birthday" from her secret crush, Ben. But the instant she blurts out the truth to him in the middle of Boston Common, her whole world shatters. Because the Boston that Selkie knows is only an elaborate enchantment constructed to conceal the truth: Selkie is a half-faerie princess. And her mother wants her dead. The faerie court believes Selkie is a child of prophecy-fated to destroy the court's powerful grip on the supernatural world. And the only way for Selkie to survive...is to prove them right.