Split Second: An FBI Thriller, Book 15

In this gripping thriller from #1 New York Times bestselling author Catherine Coulter, FBI agents Dillon Savich and Lacey Sherlock race against time to capture a serial killer connected to a notorious historical figure. Joined by agents Lucy Carlyle and Cooper McKnight, they navigate a web of murder and familial secrets, particularly as Lucy uncovers the dark truth about her grandfather’s death at the hands of her grandmother. As tensions rise and danger closes in, Savich finds himself becoming the killer's target, leaving Lucy to unravel a century-old mystery before it's too late.