Ember of night
(Book)

Series information from Goodreads.

"Author's note: This book depicts issues of emotional and physical abuse, violence and gore, suicidal thoughts and sexual content. I have taken every effort to ensure these issues are handled sensitively, but if these elements could be considered triggering to you, please take note." -- Page opposite page [1].

Harley is unloved by her abusive, alcoholic father. Unwanted by her classmates. Unnoticed by everyone else, but determined to give her kid sister a better chance in life. When Draven, a hot stranger, tells her she's the key to stopping a war between Heaven and Hell, she knows he's a liar. But suddenly everyone is gunning for her-- and Harley needs to figure things out fast. -- adapted from jacket