In this alternately chilling and hilarious sequel to The Atrocity Archives (2004) from Hugo-winner Stross, Bob Howard is a computer ubergeek employed by the Laundry, a secret British agency assigned to clean up incursions from other realities caused by the inadvertent manipulation of complex mathematical equations: in other words, magic. In 1975, the CIA used Howard Hughes's Glomar Explorer in a bungled attempt to raise a sunken Soviet submarine in order to access the Jennifer Morgue, an occult device that allows communication with the dead. Now a ruthless billionaire intends to try again, even if by doing so he awakens the Great Old Ones, who thwarted the earlier expedition. It's up to Bob and a collection of British eccentrics even Monty Python would consider odd to stop the bad guy and...