What is happening to teenagers? OK one minute and the next killing themselves after slaughtering their parents in gruesome ways. Help is at hand in the form of Dai and a few other experts. I really liked the beginning and the premise of this but then romance set in so was it a thriller or a romance book! The U.S. Officers were verging on the unprofessional, kissing at a crime scene and should they have even been working together at all after embarking on a relationship? I liked the book, characters but wasn't entirely gripped by what happened. Wish this had had less romance and a few more scary bits!