I really enjoyed this book. I'm not really sure WHY, since it was very similar to Julie Kagawa's Immortal Rules (which I read and did NOT like) but somehow, despite the constant similarities, it was different enough to make it better. 
 I'm not going to lie. Young adult books involving romance and men that are either A)mythological in nature or B) magical in some way are my guilty pleasure. And although there really isn't too much of a romance factor in this book, it's enough to appeal to that guilty pleasure without being obnoxious and in the way of the story. 
 I mentioned that the book is very similar to the Immortal Rules. Really, this book is a lot of the Immortal Rules, mixed with one part Hunger Games and a dash of Hush, Hush. 
 First, the obvious. Fallen Angel. Patch, much? Except that Raffe is much more likable and much less of a jerk than Patch. Not that he's not also distant or has his moments. But he's much more human than the typical fictional bad boy. The characters' emotions and reactions seem very believable and real considering the situations they're in, Raffe's included. So, aside from the whole fallen-angel-with-a-human-girl thing (missing wings and all) there's not much more to the similarities between Angelfall and Hush, Hush. Also, Penryn is MUCH much much less annoying than Nora. 
 There's a definite Hunger Games vibe, too. Mostly in Penryn's relationship with her family. Both Penryn's and Katniss' entire stories were set in motion by their efforts to save their little sisters. Both heroines have mothers who are pretty much good for nothing, not to mention emotionally unstable. Neither of them have fathers in their lives. Their drive to save their sisters is prevalent in each heroine's actions throughout their book. 
 Another similarity to the Hunger Games is the violence. Angelfall is not a blood-and-guts book, but it does have its super creepy morbid and disturbing scenes. Bloody limbs scattered on the ground and gnawed-on children hanging dead from trees. Things happen that shouldn't. Plans don't always work out. The last 1/4 of the book just had a wrongness about it. But not in a "this is a terrible book" way. It was a "this book is awesome because I care about these characters so HOW COULD THIS HAPPEN!?" sort of way. 
 And then there's the super strong Immortal Rules vibe throughout the whole book. I was actually afraid to even start the book because I was worried it'd be just like the Immortal Rules. I was getting kind of sick of dystopian fantasy anyway. I'm still not really sure why I liked it so much and disliked Immortal Rules so much, given the similarities: 
 -Badass female main character. 
 -Dystopian world, streets unsafe at night, gangs running rampant, etc. 
 -Heroine is saved by the enemy. 
 -Heroine joins band of humans whom she relates to but whom she is on opposite sides with, but sympathizes with their cause. 
 -Creepy nonhuman things (likely supernatural in origin) some out at night and chew on humans 
 -Disembodied limbs and stuff 
 -Heroine travels into the heart of enemy territory 
 -Heroine's savoir from the enemy team is actually not on good terms with said enemy team 
 -Science experiments 
 I could probably go on, but I'll refrain. If you liked the Immortal Rules, you'll probably really like this book. If you hated the Immortal Rules, you might like Angelfall anyway. The thing that disappointed me most with this book was simply the fact that the sequel isn't available yet!