The Gauntlet

In Elizabeth I's England, the newly made vampire Kit Marlowe owes a debt to Gillian Urswick, a witch with a taste for highway robbery who has landed herself a date with the hangman's noose. When the Silver Circle, the magical community's self-appointed guardians, sentence her as a thief and a Druid conspirator, only Marlowe stands a chance of breaking her out of their high-security prison in time. Set centuries before Karen Chance's Cassandra Palmer novels, in the same world.