This was really good, but I still have a hard time believing so many police officers/detectives want to rely on a teenager for help solving the crimes. Setting that aside, though, the premise of the murders was really clever, I thought: the “game”. Unfortunately, the book ended on a bit of a cliffhanger for each of our teenage characters. I believe there is one more book to the series, in addition to a few prequels that I haven‘t yet read.