"Being a skeptic is somehow making Sloan Skye one of the best profilers in the FBI's new Paranormal Behavioural Analysis Unit. True, her so-called love life isn't any less tangled, but she's beginning to believe she's found a place where her uber-geek smarts and her more out-there methods fit perfectly. Unfortunately, all the incredible things she's seen can't prepare Sloan for the ultimate horror show--returning to her old high school. Someone--or some thing--is draining blood out of local teenage girls while they sleep. And the only way Sloan can solve the case is to push past her training and surrender to powers beyond her formidable logic to root out one very elusive killer."--Page 4 of cover.