Fallen - Terkutuk

I'm curious about how the myth of angels was adapted into this dark romantic universe. Did the author draw from specific traditions or create a new mythos?

The chemistry was intense, but I wonder if the rapid progression made it feel less believable or more addictive. What were others' impressions?

The characters often grapple with moral ambiguity, which added depth. I wonder what inspired this nuanced depiction of morality in angels and humans.