**Shortlisted for the Lakeland Book of the Year!**

Ten years ago, troubled Emma Bestwick walked out of her cottage in the sleepy Cumbrian town of Coniston. Never to be seen again. The gossips say she ran away. Like the restless young woman she is. But Detective Hannah Scarlett doesn’t believe that. Never has, never will . . .

Now, an anonymous tip-off reveals the chilling truth: Emma is never coming home.

Detective Hannah re-opens the case — ready to do whatever it takes to get justice for Emma. Even if that means plumbing the eerie depths of the Arsenic Labyrinth, a maze of abandoned tunnels twisting beneath the fells . . .

Discover an utterly addictive, emotionally charged mystery, steeped in all the atmosphere and intrigue of England’s beautiful Lake District. Perfect for fans of Ann Cleeves, Elly Griffiths, P.D. James, Val McDermid and Joy Ellis.

**Martin Edwards is the winner of three CWA Dagger Awards, including the prestigious Diamond Dagger — the highest honour in UK crime writing!**