Not a bad read entirely, it just didn't pull at my heartstrings. 
 It is a weird take on Greek mythology. I'm definitely not a pro in this domain, but I'm pretty sure the Olympians shouldn't be preaching against the seven deadly sins. 
 Kate is an okay character, I didn't love her, but I didn't hate her either. I was actually amazed by this girl's desire to sacrifice herself for everybody else. 
 Henry (aka Hades) is a nice enough guy, just too emo, and come on! A millenia-old VIRGIN Greek God? I just don't buy it! 
 There was hardly a spark of chemistry between Henry and Kate. I guess the author is not good at writing sexual tension. And yeah, every time anything at all happened, it looked like Kate was corrupting his innocence. But we already know that was because lust is a sin and the gods, according to Zeus (and I'm not kidding you!) "... do not abide lust". LOL. Maybe that was why Kate and Henry spent their wedding night playing card games??? They loved each other, didn't they? 
 Another question I have - why was Kate's mother so adamant that Kate spent her first summer without Henry? Why leave at all? That didn't make sense to me. 
 And what was James's problem? He was so sulky all the time. It's not like he was in love with Kate, after knowing her for only a couple of weeks. She regarded him only as a friend, after all. Ok, I get it that the author is possibly trying to set up a love triangle here for the next book, but it just feels so forced. 
 Also, the book lacked humor. It didn't even make me smile. 
 But I laughed out loud reading some of the reviews afterwards. So at least some kind of compensation here. 
 I'm probably still going to read the sequel.