There are many top cult classic novels. 'The Scarlet Letter' by Nathaniel Hawthorne is one. It deals with sin and redemption in a Puritan society. 'Invisible Man' by Ralph Ellison is also a cult classic that delves into issues of race and identity. 'The Bell Jar' by Sylvia Plath is a cult classic which offers a look into the mind of a young woman struggling with mental illness.
The top cult classic novels vary in themes. 'Frankenstein' by Mary Shelley is a cult classic. It's about a scientist creating a monster and the consequences. 'Moby - Dick' by Herman Melville is another. It has a complex exploration of obsession and the sea. Also, 'The Picture of Dorian Gray' by Oscar Wilde is a cult classic with its exploration of beauty, morality and decay.