The Dee Valley Killings by Simon McCleave

DI Ruth Hunter hopes that settling in Snowdonia with will melt away the grief of a missing partner. Burying herself in her work, she senses that her current missing persons case isn’t all that it seems. When a man’s body turns up torn to pieces, Ruth realises that she is now tracking a deadly serial killer.
Working with her fiercely patriotic Welsh partner, DI Hunter soon has a prime suspect in her sights – although he seems to always be one step ahead of them. When the killer begins to claim a personal connection to her, Ruth fears a grisly end to her and her family.
Narrated by Deryn Edwards.