This epic fantasy tells the tales of clashing Guilds, magic-fueled machines, intrigue and revolution--and the one family that stands between an empire's salvation or destruction. The nation of Torwyn is run on the power of industry, and industry is run by the Guilds. Chief among them are the Hawkspurs, and their responsibility is to keep the gears of the empire turning. It's exactly why matriarch Rosomon Hawkspur sends each of her heirs to the far reaches of the nation. Conall, the eldest son, is sent to the distant frontier to earn his stripes in the military. It is here that he faces a threat he could have never seen coming: the first rumblings of revolution.Tyreta's sorcerous connection to the magical resource of pyrstone that fuels the empire's machines makes her a perfect heir-in theory. While Tyreta hopes that she might shirk her responsibilities during her journey one of Torwyn's most important pyrestone mines, she instead finds the dark horrors of industry that the empire would prefer to keep hidden. The youngest, Fulren, is a talented artificer, and finds himself acting as consort to a foreign emissary. Soon after, he is framed for a crime he never committed. A crime that could start a war. As each of the Hawkspurs grapple with the many threats that face the nation within and without, they must finally prove themselves worthy-or their empire will fall apart.