Ground State (Expeditionary Force, #19)

The mission to destroy the enemy Gateway was literally a smashing success.

Except the Pirates were too late, and now not one but two of the enemy are loose in the galaxy. And they are equipped with starships more powerful than Valkyrie. A direct fight would be hopeless, so the Pirates must rely on wacky ideas from the mushy brain of a monkey—and some serious sketchiness.

The Expeditionary Force saga continues in book 19 from epic sci-fi writer Craig Alanson and narrated by none other than R.C. Bray.