Aishling Morgan 
Cruel Shadow [EPUB ebook] 

Peter Williams is a sales supremo who lives for the road. Infatuated by the inviting bottom on the cover of an erotic novel, Peter is determined to enjoy a spell with its owner, the lustruos Linnet, and her friends. Peter prides himself on driving a hard bargain, but with Linnet in his car, things get harder than he bargained for.
Fry-ups, flagellation, hot tarmac and hotter sex follow as Linnet and her friends take Peter along a series of sexual byways that weren»t even on his roadmap before.
Part of the Nick Mordaunt series: fantastic fetish erotica featuring occultist Nick Mordaunt. Titles in this series include Natural Desire, Strange Design and Satan»s Slut.