A Kirkus Best Science Fiction and Fantasy Book of 2017
A Popsugar Best Book of the Year

From the New York Times bestselling author of Robopocalypse comes an epic new thriller about a race of ageless automatons who have been hiding among us for untold centuries.

In the depths of the Kremlin in 1725, the tsar s loyal mechanician brings to life two astonishingly humanlike mechanical beings. Peter and Elena are a brother and sister possessed with uncanny power and destined to fight ...