This is the first book in the Tally Whyte series.
"They call it the Grief Shop. It's the Office of the Chief Medical Examiner for Massachusetts, and Tally Whyte is the director of its Grief Assistance Program. She lives with death every day, counseling families of homicide victims. But now death is striking close to home. In fact, the next death Tally deals with may be her own. Boston is in the grip of a serial killer known as the Harvester, due to his fondness for keeping bloody souvenirs of his victims. But many of those victims are people that Tally knew, through her work or as friends. Tally realizes there's a connection, a link that only she can find. But she'd better find it fast. The Harvester is getting closer." --Publisher's blurb