A near-perfect, delectable book; I think the little bitty bit that's not fully realized for me that gives me trouble is Anna's character. I think I overall prefer slightly stronger characters. These characters are not weak or unlovable, so do not get me wrong. In the pursuit of a fantastic plot, I think a little bit of character quirks are lost because there's no time to get into all the little things that really make characters/people truly unique. 
Fake marriage? inheritance schemes? private islands? great chemistry? What else could a girl ask for plot-wise? 
I highly recommend this book. I started and finished it in the span of about 12 hours (8 of which I was asleep).