Tunnel of Bones (City of Ghosts #2)

In "Tunnel of Bones," Cassidy Blake returns with her ghost best friend, Jacob, to explore the haunted depths of Paris while her parents film their show on the world's most haunted cities. Amidst the charm of croissants and the Eiffel Tower, Cass inadvertently awakens a powerful spirit lurking in the Catacombs. With her ghost-hunting skills still developing, she must enlist the help of friends, old and new, to unravel a gripping mystery before the spirit wreaks havoc on the city. Best-selling author Victoria Schwab weaves a thrilling tale that explores both adventure and the complexities of friendship.