Fallen Series by Vivi Anna

Forced together, the two battle demons…and each other All that's left of infamous demon hunter Ivy Strom's family is the brother who vanished three years ago. Now that she's finally close to finding him, the last distraction she needs is sexy half human, half demon Ronan Ames. The tainted blood in his veins makes him a foe. Yet his unique abilities make him a powerful partner... moreForced together, the two battle demons…and each other All that's left of infamous demon hunter Ivy Strom's family is the brother who vanished three years ago. Now that she's finally close to finding him, the last distraction she needs is sexy half human, half demon Ronan Ames. The tainted blood in his veins makes him a foe. Yet his unique abilities make him a powerful partner. She can't resist his help in the search for the vicious enemy that can locate her brother, who holds the key to hell and Ronan's salvation. Nor can she deny the searing desire that draws them together…even though a passionate alliance might destroy them both. less

She's been to hell and won't go back...For years Daeva was happier than any demon could hope to be. But her world came crashing down when she revealed her true identity to her lover. Quinn Strom, the exorcist and broodingly handsome demon hunter, sent her straight back to hell without a backward glance.Now, three years later, he needs her help. The key to the Chest of Sorrows has been stolen, and the hunt is on to unlock the horrific contents onto the world... moreShe's been to hell and won't go back...For years Daeva was happier than any demon could hope to be. But her world came crashing down when she revealed her true identity to her lover. Quinn Strom, the exorcist and broodingly handsome demon hunter, sent her straight back to hell without a backward glance.Now, three years later, he needs her help. The key to the Chest of Sorrows has been stolen, and the hunt is on to unlock the horrific contents onto the world. Daeva is the only one who knows where it is--but there's a price to pay. Quinn has no choice but to make a deal with her. A deal that now gives her ultimate power over Quinn... less