Phantom Prey (Lucas Davenport Series #18)

"Chalk up another winner for [John Sandford] and his all-too-human hero" (Richmond Times-Dispatch) in the #1 New York Times bestselling Prey series.
After one troubled college-age student disappears and two are found slashed to death, Lucas Davenport finds himself hunting what appears to be a modern-day Jack the Ripper. Unfortunately the clues aren't adding up-and then there's the young Goth girl who keeps appearing and disappearing. Where does she come from? Where does she go every night?...