HELP ME FIND A BOOK PLEASE!!!

Last year I found a lovely book, that i enjoyed throughly. Istupidly removed from my libary, and want to read again. I'm hoping members can help.

The story's scenario is P>O>V about seven levels of hell and thier Lords (mainly 5th & 7th). A mercenary (secretly the prince of 7th Hell) and A dark-hair girl called Raven (i think). 

Raven is attacked by men, abruptly triggering her unknown power, and ends needing to flee, soon discovering she is the daughter of Lord of 5th Hell. Meanwhile the mercenary is hunting Raven. He finds her, and on the journey to retrieve the bounty discover an irrestible attraction towards one another, 

After the 7th prince saves her from Fae Prince, they become in Love, all the while resisting his father's (lord of 7th hell) dark pull.  Ravens 



Asking questions is how you learn. I believe that is how you get to know someone.

+ Trust is not just given, it is Earned
+ I would NOT Judge you. So Do Not Judge Me
+ if you want Respect, you give Respect (as True Respect is earned)
+ A woman of my word. (don't say it unless you can/mean it)

Some of you will think "she's a right snob", some of you think "o k a y. weirdo!" lo I just prinicples