Scary stuff for that age needs to hit a sweet spot—giving you the creeps without leaving you unable to sleep for a week. I remember being thirteen and wanting that adrenaline rush but getting nightmares from things that were too graphic. Something like 'Coraline' works because the horror is more atmospheric and weird than outright gory. It's unsettling in a way that sticks with you, not just shocks you.
For a more modern pick, 'Lockwood & Co.' is fantastic. It's basically ghost-hunting teenagers, so the protagonists are right in that age range dealing with genuinely creepy specters. The stakes feel real, and the eerie settings are described so well you can practically feel the chill. It's thrilling because you're following kids who are competent but still scared, which makes it relatable.
Mary Downing Hahn's books were a gateway for a lot of us. 'Wait Till Helen Comes' or 'Deep and Dark and Dangerous' have that classic, almost timeless ghost story feel. They deal with friendships, family secrets, and past tragedies, so the scares are tied to emotional stakes, which I think makes them more impactful for a young teen than just a slasher plot. The endings usually offer some resolution, too, which helps.