At the start it was just stories. Stories of plague graves, vanished children and hidden steps leading to a festering underworld.

But when another child goes missing, Fraser and Cassie wonder if there's some truth in the tales.

The dark tunnels running under the city are real enough.

Then there's Billy, who promises to lead them to a decaying kingdom far more terrifying than anyone coul imagine.

Highly-acclaimed Celia Rees writes superb supernatural horror novels for teenagers.

The Vanished is one of the best.