"Big Rock" is narrated in first person point of view by the hero of this romance, Spencer, who has a big (rhymes with 'rock') and knows how to use it (or so he claims). He gets around a lot, but when his father is ready to sell the family jewelry business to a conservative, uptight stick-in-the-mud, Spencer needs to put his manwhoring ways on hold for a week and pretend to be engaged to his best friend and business partner. What does his father's business dealings have to do with Spencer's personal dealings, you ask? Absolutely nothing, except Plot.
Having read that paragraph, I bet you know exactly where this book is going. You're right. It's exactly that predictable. He and Charlotte swear their engagement is all pretend, that no one will fall in love, that things won't get weird... but sh*t gets real, they develop feelings, and things get weird. There are no unexpected plot twists.
Yet it's fast and readable and reasonably entertaining. The characters are likable if a little bit flat. The dialogue is funny. The sex is steamy. If you're not looking for anything groundbreaking, but just want a quick, feel-good read, this might be right up your alley.