I am so not impressed. 
 First of all, don't get tricked by the awfully cute cover (seriously, it's such a waste), nor by the title, who obviously refers to the widely know legend of Tristan and Iseult, which I've actually never read, although I plan to do it soon. 
 So when I started this book, I was prepared for a simple, nice love story, a retelling of some sort of the original one, something romantic and dramatic and blah blah blah. 
 The first adjective that came to my mind, though, was ridiculous. Not only was the main character an incredible bore (and therefore the whole story was pretty much ruined by her silly ideas, her constant whining and, well, her presence), the plot also lacked in sense and realism, and I'm not even going to talk about the protagonists' relationship. 
 And if you going to conjure up some huge, mean serpent, at least try to do it well. 
 But it wasn't until the very last page that I realized just how bad this book was. Marriage??? How old are you, 8? I'm not writing one more word on this.