On the streets of Boston, the world is divided into the ordinary Usuals, and the paranormal Unorthodox. And in the Department of Unorthodox Affairs, the Auditors are the magical elite, government-sanctioned witches with spells at their command and all the power and prestige that comes with it. Grimshaw Griswald Grimsby is…not one of those witches.

Vampires and humans live side by side thanks to an uneasy peace maintained by the Assembly. As an Arbiter for the powerful organization, Miles Watson is authorized to act as judge, jury, and executioner for anyone—living or undead—who breaks the law. But now Miles is up against a threat more sinister than anything he's seen in his centuries as a vampire. A criminal network in London is offering wealthy humans the chance to become vampires without the Assembly's consent. When the process goes disastrously wrong, the Boss wants to eliminate any trace of the fiasco.

Sir Hereward: the only male child of an ancient society of witches. Knight, artillerist, swordsman. Mercenary for hire. Ill-starred lover. Mister Fitz: puppet, sorcerer, loremaster. Practitioner of arcane arts and wielder of sorcerous needles. Sir Hereward and Mister Fitz: godslayers. Agents of the Council of the Treaty for the Safety of the World, charged with the location and removal of listed extra-dimensional entities, more commonly known as gods. Together, they are relentless travelers in a treacherous world of magic, gunpowder, and adventure.

A call from a distraught wife, and another from Lt. Murphy of the Chicago PD Special Investigation Unit makes Harry believe things are looking up, but they are about to get worse, much worse. Someone is harnessing immense supernatural forces to commit a series of grisly murders. Someone has violated the first law of magic: Thou Shalt Not Kill. Tracking that someone takes Harry into the dangerous underbelly of Chicago, from mobsters to vampires....

A dance club full of bodies. Cause of death - a mystery. The lone survivor - a man, raving like a lunatic, wearing only a deerstalker hat. Now, the man who calls himself Sherman Holmes is being studied like a lab rat by a top-secret government agency. How is it he can be barely clinging to reality one minute - yet be a seeming genius the next? Within his brain might just be the greatest scientific breakthrough of the millennium, if anyone can figure out how to access it. Enter the agent code named Watson.