Ring by Koji Suzuki
This is the Japanese horror novel that the Japanese and American movies are based on and is the first of the Ring Trilogy. I haven’t seen the movie since supernatural horror films terrify me deep into my soul but I enjoyed the mystery element of the story, even though in the end, Asakawa realises the futility of his victory.
You’d think more people would have read it but I haven’t encountered many. If you have, give a shout out in the comments; I’m very eager to be proven wrong.