Loved this book. It's one of those rare ones that constantly makes you grin and laugh. 

Would have been 5 stars if the ending had been different. I loved Olive's and Ethan's banter, their chemistry, etc., but I took real issue with

Ethan not believing Olive. It's bad enough to delude yourself into believing that your brother isn't a a piece of shit personified, but it's a problem when you refuse to believe it when your girlfriend tells you she was harassed by said piece of shit. He could have easily resolved this issue by talking to Dane, told him that if their relationship really was open then he doesn't mind if he confirms with his wife. Maybe if it had been better explained why Ethan had such a blind spot for Dane, I would have understood it better, but at this point I was just very disappointed with the ending and I found it difficult to believe that Olive could forgive it so easily.