A signed hardback copy of Kate Ellis's latest Wesley Peterson mystery, THE STONE CHAMBER (#194)

On a summer evening Robert and Greta Gerdner are shot dead at their home in the Devon countryside. DI Wesley Peterson suspects the execution-style murders might be linked to Robert's past police career - until Robert's name is found on a list of people who've been sent tickets anonymously for a tour of Darkhole Grange, a former asylum on Dartmoor.

Wesley discovers that other names on the list have also died in mysterious circumstances and, as he is drawn into the chilling history of the asylum, he becomes convinced that it holds the key to the case.

With the clock ticking, Wesley must solve the puzzle before the next person on the list meets a terrible end.

Kate Ellis is the author of the highly acclaimed Wesley Peterson series and the Albert Lincoln trilogy. She was awarded the Crime Writers' Association Dagger in the Library in 2019.