Assault: The Ja-gee In Extremis: Book 3 of the Laner Series

Commodore Arthur Laner and the crew of Peregrine have driven the remnants of the Ja-jee invasion fleet from the Brasilia star system, but it has been a pyrrhic victory. The missile carrier fleet and Swarm fleet are gone. Brasilia is smashed. And the Ja-gee will be back, worse than ever before.
Laner and Peregrine must rescue survivors, establish a new base, make salvage into starships, and train the battle groups that will carry the fight to the Ja-gee.
That would have been too much as it is.
But unlocking the secrets of a captured Ja-gee juggernaught poses more questions than it answers. Assassins wait around every corner. Nepotism puts incompetent officers in critical posts. And the Ja-gee are making their own preparations. Can Humanity survive, or is Laner just delaying the inevitable?