Fifteen teens are trapped in a zoo where the animals have mysteriously gotten loose. Smarter and stronger than they should be, they're working together to kill humans. It's going to be carnage. 'One of the UK's most promising writers' Edinburgh Evening News 'One of the UK's best new talents' Lovereading.co.uk 'Jan Henderson writes the kind of thrillers that make you miss your stop on the bus' The Times Educational Supplement 'Jan Henderson has written some incredible books... One of my favourite authors' Sharon Rooney (star of My Mad Fat Diary and Barbie) 'If there were more books like yours out there maybe boys would be reading more' Charlie Higson (Young James Bond and The Enemy series)