Racing the Dark (Spirit Binders, #1)

Racing the Dark is set in a land of volcanoes and earthquakes, plagues and typhoons, of island nations bound by fear of the spirits they imprisoned to control their volatile environment. Lana, a teenaged girl on a nameless backwater island, finds an ominous blood-red jewel that marks her as someone with power, setting in motion events that drive her away from her family and into an apprenticeship with a mysterious one-armed witch.