Etherlin Series by Kimberly Frost

As the last heiress of the House of North, Alissa knows that striking up a secret friendship with a half-vampire enforcer is dangerous, but Merrick is a temptation she can't resist. But when Alissa is kidnapped, Merrick proves that he will do anything to protect the woman who tempts him with her very existence.

She should never have touched his blood... The Etherlin muses have long served as a source of divine inspiration. Now their world stands between the forces of Heaven and Hell. As his muse, Cerise propelled her musician boyfriend to the heights of fame, but when he died under mysterious circumstances, her powers vanished. Now she's plagued by disturbing half-formed memories of his final night...until she meets Lysander, who seems to hold the key to restoring her memories and abilities... moreShe should never have touched his blood... The Etherlin muses have long served as a source of divine inspiration. Now their world stands between the forces of Heaven and Hell. As his muse, Cerise propelled her musician boyfriend to the heights of fame, but when he died under mysterious circumstances, her powers vanished. Now she's plagued by disturbing half-formed memories of his final night...until she meets Lysander, who seems to hold the key to restoring her memories and abilities. Fallen archangel Lysander is consumed by his quest for redemption until it leads him to the captivating Cerise. Now his thirst for revenge is rivaled only by his passion for the woman he can't resist. Bound by blood and stalked by a deadly enemy, will they pay the ultimate price for succumbing to their passion? less