Not my favourite in terms of suspense level, but I did enjoy reading this and liked the format, using social media was a more novel one to me. In this story the reader and the Amateurs know who the killer is but are racing to follow his clues to find him before he strikes again. You can feel their desperation to save Chelsea. They are sent clues from Brett and are determined to track him down as well as save her. He is a really creepy character, very well written. Knowing the identity of the killer in mysteries makes a book less enjoyable for me but there were still twists in the plot that kept my interest. Overall I found it an entertaining mystery-thriller but not necessarily a series I want to follow further.