The protagonist's primary fear is being caught for the murder he committed, as evidenced by his paranoia and the constant hearing of the victim's heartbeat.

Lovecraft's story delves into the psychological horror of cosmic insignificance, as the discovery of Cthulhu and its ancient cult reveals the vastness and indifference of the universe, making humanity seem insignificant.

The primary psychological horror in 'The Shining' is Jack Torrance's struggle with isolation and loneliness, which exacerbates his inner demons and leads to his descent into madness.

The psychological horror in 'The Haunting of Hill House' stems from the characters' psychological trauma and their confrontation with their inner fears and demons, rather than traditional haunted house tropes.

The psychological horror in 'The Metamorphosis' stems from Gregor Samsa's isolation and alienation from his family and society due to his transformation into a giant insect.

The psychological horror in 'Fight Club' revolves around the protagonist's dissociative identity disorder, as he struggles with his alter ego, Tyler Durden, and the consequences of their actions.

The psychological horror in 'The Drowned World' stems from the characters' existential despair and loss of purpose in a world ravaged by climate change and environmental collapse.

Ligotti's story delves into the psychological horror of cosmic pessimism, where the universe is seen as inherently meaningless and indifferent to human existence.

The psychological horror in 'The Hellbound Heart' stems from the protagonist's moral corruption and his descent into depravity as he becomes possessed by a demonic force.

The psychological horror in 'Lord of the Flies' centers around the boys' loss of innocence and their descent into savagery and violence as they are left to fend for themselves on a deserted island.

The psychological horror in 'The Handmaid's Tale' stems from the women's loss of freedom and autonomy in a totalitarian society where they are treated as mere reproductive vessels.

The psychological horror in 'Never Let Me Go' revolves around the clones' existential dread and their struggle to find meaning and purpose in their lives, knowing that they are destined to die young.

The psychological horror in 'The Road' stems from the father and son's loss of hope and their struggle to maintain their humanity in a post-apocalyptic world.

The psychological horror in 'Kafka on the Shore' centers around the protagonist's loss of identity and his journey to discover his true self amidst surreal and dreamlike events.

The psychological horror in 'Under the Skin' stems from the protagonist's alienation from humanity and her inability to understand and connect with human emotions.