The Darkest Pleasure is the third in the Lords of the Underworld series by Gena Showalter. With each book, the series just gets better, as you learn more about the Lords, humans, and immortals. The Darkest Pleasure focuses on Reyes, who is the Lord or pain, and Danika Ford, who is on the run from the Lords as Aeron is trying to kill her. Reyes and Danika have been drawn to each other from their first meeting, but both have fought their feelings. Reyes because he doesn't feel that he deserves anyone good to be with him and Danika because she doesn't understand why she has such strong feelings for Reyes.
Reyes and the other Lords are in the process of finding the remaining 3 artifacts that will help them locate Pandora's box. Unknown to anyone, Danika is the key to locating one of the artifacts. She had been kidnapped by some of the Hunters searching for the Lords and even thought for a time to work with the Hunters to bring the Lords down. However, Danika's feelings for Reyes mean more to her, especially as she watches her continue to protect her over and over, even when I suspects she is talking to a Hunter.
Showalter delivers another winner and I can't wait for the next books in the Lords of the Underworld series.