Sins of the angels : the Grigori legacy

When homicide detective Alexandra Jarvis is assigned a new partner in Aramael, a Guardian Angel who doubles as a hit man, they have only one thing in common: a fallen angel hell-bent on triggering the apocalypse. Now they have no choice but to work together-relentlessly, fearlessly, intimately. Because only they can stop the rogue angel from ushering in the end of days. To stop the apocalypse, homicide detective Alexandra Jarvis is forced to partner with Aramael, a hunter of the fallen angels, and together they must capture Aramael's brother, who is wreaking bloody havoc in the mortal realm, and send him back to eternal exile