This is by far one of the best angel related series I have read so far and its only the first book in the series. I was so disappointed when I read the last page ....I want it to continue on! The story itself is very unique nothing similar to another noble and I loved that, very new concept especially the whole modern post-apocalyptic world ruled by angels who are not the nice celestial beings we thought they were. Then we have a 17 year old girl who takes on the responsibility of her mother and sister who are disabled in one way or another. Penryn is a very strong heroine who after attempting to move her family to a safer location whens she gets caught in the middle of a bloody fight between a few of the angels who are trying to take on one of their own-Rafael, unfortunately they cut off his wings during the struggle. Penryn helps save Rafael and in return one of the angels grabs her little sister and takes her with him. Penryn and Rafael reluctantly form an alliance in order to survive through the gang populated surroundings and to reach the main site the angels are using to live in.The place that Penryn most likely will find her sister and Rafael hopes to have his wings reattached by one of the angel surgeons. I enjoyed reading about Rafael and Penryn's unlikely companionship and we see how it evolves to a more intimate relationship although they both are scared of the consequences of getting too close unfortunately(but we see the potential). 
 Add to the mix a mother who suffers from schizophrenia who is seen throughout the story suffering from delusions and hallucinations and you have a very nice modern twist to the typical angel story line.