Sweet Peril by Wendy Higgins

Fans of Cassandra Clare's Mortal Instruments series will be drawn to Wendy Higgins's sexy, thrilling Sweet Evil series.

Sweet Peril focuses on the battle between light and dark, good and evil, within Anna Whitt, the child of a guardian angel mother and a demon father. Anna promised herself she'd never do the work of her father—polluting souls. She'd been naive to make such a claim. Haunted by demon whisperers, Anna does whatever she can to survive, even if it means earning an unwanted reputation as her school's party girl. And all the while there's gorgeous bad-boy Kaidan Rowe, the son of the Duke of Lust, plaguing her heart and mind.

Anna discovers it is her fate to banish demons from the earth, and save the other Nephilim from their dark destiny. Until then, Anna and Kaidan must put aside the issues between them, overcome the steamiest of temptations yet, and face the ultimate question: is loving someone worth risking their life?