To round out the main Clockwork Century series, Priest writes a spy and espionage thriller featuring some old and new faces, political tension, and some unscrupulous characters. Also grizzled Lincoln in a Steampunk wheelchair, which is just as full of awesome as it sounds. 
 Priest's characters continue using their strengths to triumph over their own shortcomings and all of the obstacles placed by their adversaries. The pacing is strong and culminates with several peaks spread across the divided nation. Priest then writes a pair of epilogues (not titled as such) that are both eerie and satisfying. The first is sad but an appropriate amount of closure. However the second one takes a turn towards horrific, despite the character's justification. 
 I'm sad to see this series end, but I do think the characters deserve a break after all they've been through. A fitting end to the series.