Can you recommend some disturbing horror novels?

Sure. 'Pet Sematary' by Stephen King. It's about a family that moves to a new place near a pet cemetery that has some very dark secrets. The concept of bringing the dead back to life, but not as they were, is extremely disturbing.

You might want to check out 'A Head Full of Ghosts' by Paul Tremblay. It plays with the idea of demonic possession and mental illness in a disturbing way. 'The Ritual' by Adam Nevill is also disturbing. The sense of dread and the strange creatures in the forest are really scary. 'I'm Thinking of Ending Things' by Iain Reid is a very strange and disturbing novel that will make you question what's real and what's not.

Sure. 'House of Leaves' is extremely disturbing. It has a complex and disorienting narrative structure that adds to the overall sense of unease. The story within the story about a family in a house that seems to be growing and changing in impossible ways is very creepy. Then there's 'The Girl Next Door', which is based on a true - crime - like story of a girl's torture at the hands of others. It's a harrowing and disturbing read.

One such horror novel is 'The Haunting of Hill House' by Shirley Jackson. Although not strictly diary - centered, it has strong psychological disturbing elements. The way the characters' minds are affected by the haunted house is truly chilling. Another one is 'House of Leaves' which has a complex narrative structure that includes disturbing psychological elements and some diary - like entries that add to the overall sense of horror.

One is 'American Psycho' by Bret Easton Ellis. It delves into the mind of a wealthy and deranged Wall Street executive, presenting a disturbing view of consumerism, violence, and the dark underbelly of the American Dream. Another is 'The Catcher in the Rye' by J.D. Salinger. Holden Caulfield's angst - ridden journey through New York City reveals a sense of alienation and the darker aspects of growing up.

Junji Ito's works, such as 'Uzumaki', can also be considered disturbing. The way he uses spiral motifs to create a sense of unease and horror, with stories that often involve grotesque body horror and psychological torment, is truly chilling.

One such novel could be 'House of Leaves' by Mark Z. Danielewski. It has a very disturbing and complex narrative structure that can seem almost insane at times. The use of footnotes and different typefaces adds to the sense of unease. Another is 'The Haunting of Hill House' by Shirley Jackson. Although not strictly in diary form, it has that sense of a creeping insanity as the characters experience the horror of the house. It's a classic in the horror genre.

Well, 'Haunted' by Chuck Palahniuk is very disturbing. It contains a series of extremely dark and often grotesque short stories. 'We Need to Talk About Kevin' by Lionel Shriver is also on the list. It's about a mother trying to come to terms with her son's violent and disturbing actions. And 'The Girl Next Door' by Jack Ketchum is a harrowing read that deals with extreme abuse and violence in a very disturbing manner.

One of the best is 'The Shining' by Stephen King. It's disturbing as it shows a man's descent into madness in an isolated, haunted hotel. The atmosphere is extremely tense, and the idea of the hotel having a life of its own is quite terrifying.

Well, 'Hell House' by Richard Matheson is a disturbing horror fiction. The haunted house filled with all kinds of malevolent spirits and the attempts to prove or disprove the afterlife there are really spooky. 'The Amityville Horror' by Jay Anson is also disturbing. The true - life inspired story of a haunted house with a violent past is a classic in the disturbing horror genre. And 'Misery' by Stephen King, where a deranged fan holds an author captive, is both disturbing and a great horror read.