It’s been a long wait between book three and book four of this series but I can say it was definitely worth it. While you could read this as a standalone I don’t recommend it. The first three books are really great and the character development of Caitlin is so good so you would be missing out. This one starts out a little on the slow side but that doesn’t last too long so be patient because it’s worth it in the end. The case itself is fascinating and I had no idea how everything would end up connecting and I definitely didn’t predict it at all. Dueling serial killers is so creepy and the suspense was solid. I do wish we would’ve gotten more of Caitlin’s personal life but being back with her in any capacity was still great. If you like dark thrillers, behavioral analysis type of crime fighting and clever plots this was excellent.