For me, there's a difference between Must-Read Horror and Horror Books I Like. Must-Read is the stuff like
The Exorcist and
The Shining that anyone who wants to know the field should be familiar with. But here I want to just talk about what I like:
Beloved (1987) -
Toni Morrison - I'm always surprised that fans of horror don't more readily claim this as one of our own. The
Handmaid's Tale of horror fiction, it's all about the horror of your dead child returning to offer the life you could have had, as well as the horrors of slavery.
The Werewolf of Paris (1933) -
Guy Endor - without a doubt, horror's great werewolf book. You can't tell where it's going for a while, but then there's that final chapter and...
whoa. The humanity!
Rotters (2011) -
Daniel Kraus - don't hate it because it's YA. This is the most vile, disgusting, and morally bankrupt novel to be published in years. A father and son bond over filth, moral depravity, corpse mutilation, and grave-robbing. A dark little sun of a book that is so gleefully reprehensible and countercultural that it feels dirty to read it.
Cujo (1981) -
Stephen King - out of everything King has written, this is his most literary and ambitious book. The dog with rabies? Barely even the main character.
I write a lot more about it here (with spoilers), but trust me, if you're open to it, this is one of the meanest, sweetest, most moving books King has written.
Hawksmoor (1985) -
Peter Ackroyd - everything Alan Moore does in
From Hell was done in this freaky little claustrophobic book years earlier. Occult architecture, metaphysical time travel, religious murder...this is like a wet diaper, soggy with filth and rotten meat, that gets wrapped around your face and slowly suffocates you.
The Green Man (1969) -
Kingsley Amis - a classic M.R. James haunting filtered through Amis's nasty old man style that manages to wind up being quite moving. Especially for a book that's mostly concerned with a drunk trying to convince his wife to have a three-way with her best friend.
The Phantom Lover (1886) -
Vernon Lee - written by Violet Paget, this book has the same kind of emotional delicacy, micro-observation, and subtle sense of pure, creeping wrongness that you find in the best Henry James ghost stories. In fact, I'd say if Lee had written more she'd be as well known as James, at least in the realm of short fiction.
Also, if you don't know who W.F. Harvey is, then
go read his 1910 short story, "August Heat." A one-man
Twilight Zone of a writer, he specialized in 2,000 - 4,000 word short stories that cover everything from a killer hand to a housekeeper who plots to keep her job by arranging to have her employer "accidentally" run over her own child. He should be way better known.