I’m Watching You by Mary Burton

A Virginia detective’s estranged wife is targeted by an obsessive killer in this psychological thriller by the New York Times bestselling author.

The first kill was easy. The second much easier. No guilt, no remorse, just a rush of adrenaline surging through him as each life drains away, and the pleasure of knowing their deaths help his beloved Lindsay. And there are so many more who deserve to die . . .
Lindsay O’Neil’s secret past is suddenly coming back with a vengeance. When she receives a twisted gift hidden in a bouquet of flowers, the detective assigned to the case is also her estranged husband. Only Zack knows the dark secret she lives with—or so she thinks. Now nothing can prepare her for the nightmare to come. Because everything Lindsay’s stalker does is for her. And spurning his gifts will only unleash the rage of a madman who’s far closer than she imagines . . .