Favorite BDSM related book (fiction or non-fiction).
The only things I read that I identify as specifically BDSM related are two web-novels. Tales of MU by Alexandra Erin is the more obvious of the two, considering that within the first few chapters there are dominant/submissive dynamics forming between various characters. The other web-novel, An Intimate History of the Greater Kingdom by Meilin Miranda, isn’t quite as overt about its BDSM aspects in my opinion, but they’re there.
As for books that have been published in the traditional way, I suppose Anne Rice’s Vampire Chronicles and Laurel K Hamilton’s Merry Gentry series both have some BDSM aspects and undertones. As does Lilith Saintcrow’s Dante Valentine series. But those are the only ones that come readily to mind.