Blood Lines - Eileen Wilks

Touch-sensitive FBI agent Lily Yu and her werewolf bond-mate are recruited by the Secret Service to help identify elected officials who have accepted demonic pacts. But Lily must turn to fellow agent Cynna Weaver for help when Cynna's former teacher, a demon master, emerges as the main suspect behind the pacts. After a demon commits a gruesome murder, sorcerer Cullen Seabourne joins the team racing the clock to find the apprentice of evil who uses demons to kill. Cynna and Cullen must work together- a challenge indeed when each has good reason to ignore the desire simmering between them. But passion and events both spiral out of control as an ancient prophecy is fulfilled- and the lupi's greatest enemy sets her sights on total devastation.