I absolutely loveee this book!! It’s a very interesting series which keeps u hooked throughout all the books in it. The plot development is exemplary. The characters r deep and the style of writing provides a good insight into their minds and feelings. However it can be a pretty creepy novel as it’s abt serial killers and psychopaths. So it can get scary for sm ppl. So if ur child is mature its fine to let them read it at around 12 or 13+ otherwise they shud be around 14-15 to truly enjoy the book.