Chemistry of Evil — Lynne Connolly

The bad boy of Arthur's court returns! This is book #3 in the Dept 57 series.

Sophie Adams is engaged, but the second she sees sexy Evan Howell, she wants him. When her fiancé dumps her, Evan is there to catch her. And show her a passion she'd never dreamed of before, drawn from his dark experiments into sexual magick, a magick that has driven more than one man insane. Enthralled by the new world Evan introduces her to, Sophie wants more.

Evil follows them across the Atlantic. From Arthurian Cornwall to New York, Mordred, cursed son of King Arthur, stretches his evil influence to encompass Sophie, Evan and everyone they love. Evan has already lost his sister to Mordred and his supporters -- he refuses to lose Sophie, too.

Evan, ex-convict hacker turned CIA computer genius for Department 57, explores the dark side of life. It will take all his skill to save Sophie from the danger threatening to take her over, body and soul. All his skill -- in the bedroom as well as out of it.

Together, the three will embark upon a dance of danger, at the end of which there will be only two. . .or one. . .or none