Originally published in hardcover in 2014 by G.P. Putnam's Sons.
Summary
London, 1890. Four vicious murderers have escaped from prison, part of a plan gone terribly wrong, and now it is up to Walter Day, Nevil Hammersmith, and the rest of Scotland Yard's Murder Squad to hunt down the convicts before the men can resume their bloody spree. But they might already be too late. The killers have retribution in mind, and one of them is heading straight toward a member of the Murder Squad, and his family.
