The Vault is gone, Whitehall is on the backfoot, and the assembled magical community of Great Britain is kicking off.Sounds like a, well, read the title...Jameson Parker had held out hope that maybe, just maybe, things wouldn't go off the rails when Whitehall's magical deterrent, The Vault, was taken out of play. A wee bit naive, there. With Whitehall scrabbling to respond, the mages of Britain threatening to turn on each other, and a vision of a distant apocalypse weighing heavily on his mind, it seems as though Parker is one bad day away from finding himself in the middle of a civil war - and today isn't showing much promise.Because somewhere in the shadows, The Rider is still out there pulling some strings, all with the intent of re-awakening a part of Parker that he had hoped was long gone: The Dark Lord of Hampshire.CHAOS ENGINE is the fourth entry in the exciting, enthralling, and entertaining WARLOCKS OF WHITEHALL series, a world of magic and politics perfect for fans of Hellblazer, The Dresden Files, The Laundry, and other urban fantasy mainstays.