Slow Burn by Nia Farrell

In a reverse Pygmalion story, a publicist is tasked with turning a debut novelist from geek to gorgeous.

The rights to Reuben James’s debut novel Slow Burn, a dark BDSM thriller, just sold for $1.5 million. His editor wants him cut, dressed, groomed, and coached and has given publicist Brooke Cavanaugh six months to take him from geek to gorgeous. The trouble is, the twenty-five-year-old boy-genius-turned-author isn’t just new to publishing. He’s a natural Dominant who’s only written about the lifestyle, and he’s never been with a woman.
To be fully prepared for interviews, Reuben knows that he needs experience, especially with BDSM. Willing to take one for the team, Brooke offers to help Reuben develop his Dominant skills, but turning him into a media dream proves to be her nightmare when she finds herself falling for the younger man.
Take an inexperienced geek. Add one seasoned divorcee. Throw them together in a haunted house, toss in a playroom, and watch the heat rise.