Just finished reading Uzumaki, a horror manga in the vein of Lovecraft, and it was delightfully phantasmagorical and bizarre as all weird fiction should be. Basically everyone in a small Japanese town becomes obsessed with spirals. At first that's the entire premise, with little stories about a man so obsessed that he twists himself into one inside a wooden barrel, apotter making warped, twisted pottery embedded with tormented faces; and people turning into snails and ****. And when the narrative really picks up it gets even more bizarre. H.P. would be proud.
What really makes the series pop though is the artist's visual sense. He doesn't do horror like he's trying to imitate movies. He draws unsettling images that haunt your mind with one of the oddest forms of body horror I've seen.
I put this here rather than the anime or comic threads because Exo is the only one on this site I've seen with an Uzumaki avatar and I doubt he reads those.