Secret Guardian was a huge disappointment. From the synopsis and the stellar reviews on Amazon I expected something totally different. Instead, after the first few pages, I found the characters and the situations to be totally unrealistic.
Less than 24 hours after leaving Rio chased by a bunch of bad guys and having discovered that Nathan is really Ethan and that she knows even less about him than she thought she knew before, Ann doesn't hesitate to jump naked into a pool and have sex with him - and unprotected sex, to boot. Yep, that's totally what I would expect from the smart woman we are supposed to believe she is. Not.
After that, all went downhill for me. The book became a sequence of sex scenes with several backgrounds, from a crate on a plane to a luxury house in Peru. And in just three or four days Ann knows she's in love with Ethan - a man she still knows next to nothing about. Yes, he's told her about his life and family, but then, a couple of days before she knew him by another name, which means that, from her perspective he should not be role model of honesty.
I admit the problem with this book may be all mine, since almost everyone else seems to have loved it, but to me, sadly, Secret Guardian just felt like a waste of a good plot idea.