The Story of O may be the most famous novel centered around bondage and sadomasochism. It's a heterosexual work for the most part, along the same lines as Venus in Furs and even the 120 Days of Sodom. The subject matter definitely isn't to everyone's taste; but for those who do like this kind of erotic material and have some knowledge of it, is there a particular book out there that's considered to be the gay male equivalent? Some of Anne Rice's pornographic writings delve into male-male BDSM relationships, but they're not exclusive to the plot. I can't think of any other significant titles, though there must be hundreds of gay BDSM novels in the marketplace.