Lost Fleet - Relentless (Book 5) - Jack Campbell - Bog

After successfully freeing Alliance POWs, 'Black Jack' Geary discovers that the Syndics plan to ambush the fleet with their powerful reserve flotilla in an attempt to annihilate it once and for all. And as Geary has the fleet jump from one star system to the next, hoping to avoid the inevitable confrontation, saboteurs contribute to the chaos.