A Kiss of Shadows by Laurell K. Hamilton

Meredith Gentry, Princess of the high court of Faerie, is posing as a human in Los Angeles, living as a P.I. specializing in supernatural crime. But now the Queen’s assassin has been dispatched to fetch her, whether she likes it or not. Suddenly Meredith finds herself a pawn in her dreaded aunt’s plans. The job that awaits her: enjoy the constant company of the most beautiful immortal men in the world. The reward: the crown and the opportunity to continue to live. The penalty for failure: death.

Meredith Gentry is a wonderful character caught up in palace politics and family disputes. There are eight books in this series.
(Warning: These books are VERY graphic)

Guilty Pleasures by Laurell K. Hamilton

In a world where vampires, zombies and werewolves have been declared legal citizens of the United States, Anita Blake is an "animator" - a profession that involves raising the dead for mourning relatives. But Anita is also a fearsome hunter of criminal vampires, known as The Executioner. As Anita gains the attention of the vampire masters of her hometown of St Louis, she also risks revealing an intriguing secret about herself, the source of her unusual strength and power.

In the introduction to this amazing series you'll meet Anita Blake, and you'll never look back. Just in case you get hooked, there are eighteen in this series!
(Warning: this series is very graphic)