Counted in Blood — Judith A. Barrett

Has Maggie finally met her match? A serial killer leaves a grisly message for Maggie: she's next. She does not intend to die.Maggie and her Gray Flanagan Agency staff, Paul and Heather, have their first case: investigate the grisly murders of young women. They discover the killer tracks the order of the murders with crude, deep slices on the young women's bodies. When the team doubles-down to find the killer, Maggie gets too close, and the killer gives Maggie the next number in line to die.