Since you enjoy psychological thrillers I wanted to recommend Imaginary Friend by Stephen Chbosky. I read it recently and it really impressed me. This is the guy who wrote Perks of Being a Wallflower and I really didn't think they could make a good thriller. It has Stephen king vibes and follows the story of this little boy who needs to save the town from this supernatural force. Its really suspenseful and kept me on the tips of my toes the whole time. Same as you I don't want to say too much to avoid spoilers.