Fire and Illusion — Patti Larsen

Auburdeen Hayle is supposed to be in London for her own protection. But since she chose to help and befriend Jack Bishop, everything she knows and understands has fallen to pieces around her. Worse, her friend is lost and in the hands of those who want to use him as a weapon, being slowly devoured by the living metal that infects him. Hunted by the coven meant to protect her and the constabulary being controlled by the very man who holds Jack captive, Burdie is forced to ally herself with those to whom truth and honesty are a convenience.