Tunnel of Bones

Cassidy Blake is in Paris, and her ghost best friend Jacob has come along. Her parents are filming an episode of their TV show about the world's most haunted cities, so Cass spends her days among croissants and landmarks like the Eiffel Tower.

The real danger sits underground. In the Catacombs beneath the city, Cass accidentally wakes a spirit of frightening strength, and it grows stronger with every passing day.

Cass is still learning what she can do as a ghosthunter. To understand what she has stirred up, she has to work out a mystery, and she looks for help from friends she has known a while and others she has only just met.

The clock is the pressure here. If she fails, the spirit she has set loose could haunt Paris for good.

This is a middle-grade ghost story with a mystery at its center. It mixes sightseeing and humor with creepy settings, and the tension builds as the spirit gains power. It is the story of a girl who hunts ghosts while her parents film for television.