The Source Chain

Four years after an ambush in Syria killed his team, Nate Bergeron runs quiet escort work out of Galveston and tries not to remember. Then his sister vanishes in Tbilisi, hours after telling him someone sold his men to a Russian arms broker. Hunting her leads Nate into a chain of transfers ending at a rotting Black Sea dry dock, where a stolen weapon is about to change hands—and three armed factions are converging on the same night.