The White Raven (Josephine Ackland) (Volume 1)

Josephine "Jo" Ackland comes from a long line of bounty hunters that have been putting the undead and supernatural in its place. Beth, her older sister and last member of her family, is confined to a wheelchair and must let her younger sister do all the backbreaking work. When Jo learns that a powerful demon is taking women, she seeks out the help of all her contacts in hopes to get there before all the girls are sacrificed.