The Reluctant Spy by Arianna Fraser

Maura MacLaren – mousey, dowdy, and very, very good with technology – is a perfect Corporation employee. Brilliant at her job, smart enough to know to keep her head down, and in debt to the criminal enterprise that gave her a chance when her past left her with nowhere to turn. But this puts her under the watchful eye of the Corporation’s diabolical, gorgeous, and utterly unforgiving Second in Command, James Pine.

Pine has been sent by the head office in London to be sure nothing will go wrong with the Corporation’s largest deal to date. The last thing a man in his dangerous position needs are feelings, or surprises. Especially feelings for a nerdy underling who is turning out to be full of surprises, including a sensually submissive nature that Pine finds too compelling to resist. But Pine is as cold-hearted as he is handsome and he never denies himself what he wants.

But when Maura’s darkest secret puts her life and Pine’s deal in danger, they both find themselves shocked at the sensual depths he will drag her to for revenge. And the lengths he will go to in order to save her life.