Gena Showalter has a series called Lords of the Underworld. It's a collection of supernatural romances.
"Long ago, twelve immortal warriors stole Pandora’s box. Now they carry its evils within themselves: Violence, Pain, Death, Disease, Disaster, Misery, Doubt, Promiscuity, Defeat, Lies, Secrets, and Wrath. When a powerful enemy surfaces, they will travel the world in search of sacred relics of the gods in hopes of putting an end to the one that threatens to destroy them all."
Each book basically follows a few of the characters as they search for these relics that will save them. The Titans have recently overthrown the Olympians after escaping from Tartarus; some of them help, like Cronus, and some of them try to stop them, like Rhea. It's an interesting twist on the myths especially since, at times, she combines Greek myth with Christianity. In the last book I read the main character journed to Hell by way of the Styxx to face off with Lucifer whos brother happens to be allied with the Titans... it can be a bit confusing if you don't pay attention, but it's very interesting. I've never been one for romances, but these books have so much action that you tend to foget that they're falling in love as well as fighting to save the world. It's a lot like Sherrilyn Kenyon's Dark-Hunters Series. Except Kenyon goes more with Atlanteans/Olympians rather than Olympians/Titans.
