It really depends what you're in to, but for macabre with a (usually quirky) twist I don't think you can do better than Roald Dahl. His adult books are hugely under appreciated. From getting away with murder, to selling the ultimate aphrodisiac, to making millions cheating casinos, they cover pretty much everything! There are a number of books containing collections of his short stories, including 'Ah, Sweet Mystery of Life', 'Over to You', 'Switch B!tch', 'Kiss Kiss' and 'Someone Like You'. Well worth a look.