The Rule Book by Sarah Adams

 This is a follow-up of sorts to the charming Cheat Sheet, which featured football player Nathan. The Rule Book focuses on Nathan's fellow football player and friend, Derek. Derek got injured during a game and his football future is unknown. His old agent, Bill has retired, and he's getting ready to meet his new agent, Mac, as the story begins. Imagine his surprise to discover that Mac is in fact the college sweetheart --who broke his heart--Nora. The book follows their adventures as they get over the past and try to decide whether they have a future together, with a lot of hijinks and some steamy sex thrown in. Not as good as The Cheat Sheet, but an entertaining beach book.