The King of Bones and Ashes

"Magic is seeping out of the world, leaving the witches who've relied on it for countless centuries increasingly hopeless. While some see an inevitable end of their era, others are courting madness--willing to sacrifice former allies, friends, and family to retain the power they covet. While the other witches watch their reality unravel, young Alice Marin is using magic's waning days to delve into the mystery of numerous disappearances in the occult circles of New Orleans. Alice disappeared once, too--caged in an asylum by blood relatives ... Discovering the cause of the vanishings, though, could be the only way to escape her mother's reach while determining the future of all witches"--Amazon.com.