The Killing Hour — Lisa Gardner

DEATH ALWAYS STRIKES ON TIME....

Each time he strikes, he takes two victims. He waits for the first victim to be discovered -- a body containing all the clues investigators need to find the second victim, who counts the seconds . . . to a slow but certain death.

Now, two girls have disappeared, and the deadly countdown begins again. Rookie FBI agent Kimberly Quincy knows the killer's deadline can be met -- but she'll have to break some rules to do it. Joining forces with her father, renowned FBI profiler Pierce Quincy, and his partner, Rainie Conner, Kimberly will begin a dangerous hunt for a predator like none she's ever seen.

He's had five years to perfect his game. Now the clock is ticking. For his victims and for Kimberly ...TIME'S UP.