I had high hope for this read, but was pretty disappointed. The concept of using QR codes to give early clues to readers was really clever and fun but poorly executed in the end. The scare factor just wasn’t that high, even for a middle grade novel. And I can’t imagine Mallory’s complete disdain for all things creepy would endear her to horror fans? Not a high recommendation overall, but I can see fans of Goosebumps, etc. having fun with this one.