The Lost Stars: Shattered Spear is the Final book in the spinoff series of the The Lost Fleet by Jack Campbell, published in 2016.
Summary[]
The Syndicate Worlds continues to splinter as more star systems pledge allegiance to President Gwen Iceni’s and General Artur Drakon’s new government at Midway. But the rebels fleeing the toxic legacy of Syndicate rule have difficulty trusting one another and believing their new leaders’ promises of freedom from tyranny.
Before Iceni and Drakon can put their house in order, they must deal with another threat. An enigma warship has appeared and vanished near a Syndic colony. If the aliens are capable of jumping into other human-occupied star systems, then billions of people could be vulnerable to a hostile invasion fleet anywhere it chooses to strike.
UK Cover of The Lost Stars: Shattered Spear
But an even greater liability lies with Iceni and Drakon as a once-trusted adviser turned saboteur plans revenge...