Through the Grinder (Coffeehouse Mysteries, No. 2);

Book #2 in New York Times bestselling author Cleo Coyle's Coffeehouse Mystery series... Business is booming at Clare Cosi's Village Blend, until her female customers start to die. Lieutenant Quinn is convinced that someone has an axe to grind, and, unfortunately, his prime suspect is the new man in Clare's life.
 
Now Clare will risk her heart--and her life--to follow the killer's trail to the bitter end.