Sarah Cawkwell’s Silver Skulls: Portents is her second novel featuring the Silver Skulls chapter of Space Marines (after The Gildar Rift), and features characters who have previously shown up in various short stories. The main protagonist is Sergeant Gileas Ur’ten, considered something of a rogue element by his superiors as a result of his fiery temper and unusual heritage, who leads his squad into battle against the archenemy on Valoria Quintus at the behest of the chapter’s Prognosticators. With the Inquisition involved in the mission however, there’s more at stake than just Gileas’ place in the chapter.
