The blood keeper

"Paranormal romance fans who are looking to up the ante will be drawn to this tale of horror, fantasy, and romance. For Mab Prowd, the practice of blood magic is as natural as breathing. It's all she's ever known. Growing up on an isolated farm in Kansas with other practitioners may have kept her from making friends her own age, but it has also given her a sense of purpose--she's connected to the land and protective of the magic. And she is able to practice it proudly and happily out in the open with only the crows as her companions. Mab will do anything to keep the ancient practice alive and guard its secrets. But one morning while she is working out a particularly tricky spell she encounters Will, a local boy who is trying to exorcise some mundane personal demons. He experiences Mab's magic in a way his mind cannot comprehend and is all too happy to end their chance meeting. But secrets that were kept from Mab by the earlier generations of blood magicians have come home to roost. And she and Will are drawn back together, time again by this dangerous force looking to break free from the earth and reclaim its own dark power"--

"Teenager Mab Prowd is perfectly content to practice blood magic on the secluded Kansas farm when she's lived all her life until one of her spells taps into a powerful, long-dormant curse and she finds her magic spinning out of control--and crashing right into Will Sanger, a boy from town"--