His skills of deduction are legendary, and her own sorcery is not inconsiderable. It doesn't help much that they barely tolerate each other, or that Bannon's Shield, Mikal, might just be a traitor himself. Or that the conspiracy killing registered mentaths and sorcerers alike will just as likely kill them as seduce them into treachery toward their Queen. In an alternate London where illogical magic has turned the Industrial Revolution on its head, Bannon and Clare now face hostility, treason, cannon fire, black sorcery, and the problem of reliably finding hansom cabs. The game is afoot..

    But in a valley deep in the mountains, young Isabeau grows to womanhood under the guidance of an elderly witch, and must set out on a quest, carrying the last hopes of the persecuted witches.