Well, I enjoy the arrogant hero who falls hard as much as anyone, but this was not plausible, even by the billionaire-series stretches of imagination. So Archer has always loved his best friend's younger sister Ivy, a perfectly generic sort of good girl with a great body, but no one has ever noticed? and he refuses to approach her because she's "too good" for him (what's so awful about him anyway? despite all the arrogance and success?) and when he does start screwing her anyway (because he can't help himself and thus must manipulate her into it through lying and going behind her back) he still has to keep it a secret from her brother (who would "kick his ass" etc-- why? why don't brothers ever "allow" their sisters to date? especially people they supposedly like like their own friends? maybe the transition is awkward, but I just don't get that common sexist plot device). So basically Ivy is a pushover and Archer is an asshole throughout the book and then they decide to get married. Good luck to them-- 
 I finished it though, and I keep giving Monica Murphy more chances, so I guess there's something working. Or else I'm too much like Ivy after all-- constantly forgiving and making excuses for bad behavior.