Switch by John Lutz
Find The Cat, Catch The Killer
Dead in her penthouse apartment. Designer scarf around her neck. Dismembered finger in a place it should never be. What the police haven't found is her diamond-and-ruby bracelet, switched with a cheap imitation. A bracelet that mysteriously ended up around the neck of a little girl's pet cat. Now the feline is missing, the killer has struck again--and former NYPD detective Frank Quinn has to track down both the cat and the culprit before the next body drops. Quinn's played his share of cat-and-mouse games before. But this time, when fingers are pointed, the claws come out. . .
"Lutz knows how to make you shiver." --Harlan Coben on The Night Spider
"A heart-pounding roller coaster." --Jeffery Deaver on Night Victims
"Nail-biting. . .dramatic suspense." --Publishers Weekly (starred review) on Mister X