Once in a Half Moon — Fran Mcnabb

Coming home was supposed to make life easier for Nikki Clark, but on the first day of her new job her world is turned upside down when she comes face-to-face with Russ Preston, the former husband of her best friend in college. Nikki hoped to make a clean start after her divorce, but seeing Russ again after so many years brings back a lot of old memories.
Buying a charter boat helped Russ survive the years while his little girl, Libby, endured operations from a serious accident and his wife found solace in the arms of the child's doctor. Russ is unsure whether introducing someone new into Libby's life is a good idea, even an old friend like Nikki. Now Nikki must work with Russ every day as she schedules fishing charters for a coast hotel. Being constantly thrown together brings Nikki and Russ closer and they have to decide if it's worth risking their friendship for a chance at the sort of love that comes along once in a half moon.