These details for book?

What or who protects humans from demons? Half breeds, those who because of the mortal blood in the halfling, they can not do things that the full blooded ones can do. Like a werewolf halfling can not turn into a wolf, but does have the strength and healing abilities, tho they don't heal as fast. The main girl had the soul of a dragon sealed to her own, so she unconsciously draws on its strength which increases her own even tho she smells of human.