Gena Showalter 
Wicked Nights [EPUB ebook] 

Leader of the most powerful army in the heavens, dark angel Zacharel has been deemed too dangerous, too ruthless — and if he isn’t careful, he’ll lose his wings.But this warrior will not be deterred…until vulnerable mortal Annabelle tempts him. Accused of a crime she did not commit, Annabelle has been imprisoned for four years.Demons track her every move. Zacharel is her only hope for survival, but is the brutal angel with a touch as hot as hell her salvation — or her ultimate damnation?