Created after the Metropolitan Police’s spectacular failure to capture Jack the Ripper, The Murder Squad suffers rampant public contempt. They have failed their citizens. But no one can anticipate the brutal murder of one of their own . . . one of the twelve . . .When Walter Day, the squad’s newest hire, is assigned the case of the murdered detective, he finds a strange ally in the Yard’s first forensic pathologist, Dr. Bernard Kingsley. Together they track the killer, who clearly is not finished with The Murder Squad . . . but why?Filled with fascinating period detail, and real historical figures, this spectacular debut in a new series showcases the depravity of late Victorian London, the advent of criminology, and introduces a stunning new cast of characters sure to appeal to fans of The Sherlockian and The Alienist.

    Yet, even as he matches wits with his seemingly clairvoyant opponent, Gurney’s tragedy-marred past rises up to haunt him, his marriage approaches a dangerous precipice, and finally, a dark, cold fear builds that he’s met an adversary who can’t be stopped.In the end, fighting to keep his bearings amid a whirlwind of menace and destruction, Gurney sees the truth of what he’s become – what we all become when guilty memories fester – and how his wife Madeleine’s clear-eyed advice may be the only answer that makes sense.A work that defies easy labels -- at once a propulsive masterpiece of suspense and an absorbing immersion in the lives of characters so real we seem to hear their heartbeats – Think of a Number is a novel you’ll not soon forget.