Beginning with Kushiel's Dart and extending across a pair of trilogies, Kushiel's Legacy may be the most risque of the currently popular fantasy series. This medieval world has enough debauchery and deviancy to make residents of Sodom and Gomorrah blush – in other words, it's right up Showtime's alley.
Kushiel takes place in a fantastic mirror of 12th-century France, with a plot inspired by some of the more spicy segments of Christian and Jewish mythology. Leading lady Phedre is cursed by a minor physical flaw and sold into slavery, wherein she embarks on a whirlwind tour of Carey's complex and intricate world. There's enough material in the first book for three seasons of television at the very least.