Tunelul oaselor

Cassidy Blacke goes to Paris. Ghosts haunt its old streets and its tombs below ground, called catacombs. Her parents film there, and she learns local history and strange tales. Below ground, she faces spirits that have roamed for hundreds of years. Her friends help her face threats to her life.

Victoria Schwab wrote this ghost story for young adults. It follows Cassidy from Orașul fantomelor. Schwab is a New York Times bestselling author. The tale blends the city's sights and past with threats from the spirit world.

Cassidy feels watched after she visits the catacombs. She also notes strange events. A sudden chill warns her that a strong spirit may be near. Her friend Lara thinks she has drawn a poltergeist. This is a spirit that feeds on chaos, Lara explains. Cassidy's ghostly energy or Jacob's may have woken it. The spirit can leave the place where it died. It can cross into the world of the living, too. This makes it more of a threat than the ghost Cassidy faced in Edinburgh.