At the Stroke of Madness (Maggie O'Dell #4) by Alex Kava

IN THE TOMB-LIKE SILENCE OF AN ABANDONED ROCK QUARRY, SOMEONE IS TRYING TO HIDE THEIR DIRTY LITTLE SECRETS 

When Special Agent Maggie O'Dell receives a concerned phone call from Dr Gwen Patterson about a missing patient, she agrees to look into the woman's disappearance.

At first she dismisses Gwen's fears, but then a graveyard of bodies is discovered in rusted barrels buried in a rock quarry.

Is there a link between the missing patient and the horrifying murders? Maggie is drawn into a case that sickens even a seasoned criminal profiler like herself. For this is a killer obsessed with collecting trophies from his victims -- prizes he cuts out of the dead..

Genres: Mystery - Thriller - Crime - Suspense - Mystery Thriller - Detective - Murder Mystery - Procedural - American Author