His Assistant (The Apprentice #1)
Lynn Forest

Through a chance encounter, she meets private investigator Donovan Brighton. Donovan needs an assistant, someone with some understanding of the law and the court system, so he extends a job offer to Alicia. However, it is quickly apparent to her that this handsome man in his forties demands things be done his way.
Donovan is immediately impressed with Alicia’s work – if not her attitude – and asks her to consider becoming his apprentice. But Alicia soon takes a needless risk with her safety, and discovers what his brand of discipline really feels like. And when another careless move results in her having to be rescued from kidnappers, she finds that Donovan knows just how to firmly address her second offense.
This book was previously published under Carl Hamlin titled The Apprentice.