Olivia Kidney has been through a lot. Being able to communicate with ghosts means never a dull moment—or a normal life. But just when things have calmed down, Olivia’s father insists she enroll at one of the most prestigious arts schools in Manhattan! Yet her school problems take a backseat when Olivia must help her friend Frannie solve an age-old mystery, one that forces her deep underground into the infamous, intricate subway system of New York City. And what awaits her makes ghosts look like child’s play.

Favorite characters return in this wild, funny, completely unforgettable adventure. Olivia Kidney remains one of the freshest heroines in children’s literature.