The Fallen (Book 1)

Elena meets a mysterious guy at a party and now everywhere she goes he's there from afar, she knows nothing about him and it seems like he doesn't want her to know, he always seems to be surrounded my bad things and people. He has a secret and she knows he has one but doesn't know 'it'. Until she finds out about everything him being a fallen.
War is coming between the nephilim and fallen angels.....where does the girl stand in the war? " Heaven condemned me and Hell betrayed me".