Robotech Sentinels: World Killers - Robotech Saga, Book 16

The bearlike Karbarrans and the swashbuckling amazons from Praxis, the feral natives of Garuda and the Human Robotech heroes -- these oddly -- met champions banded together with other races, from other planets, to form the Sentinels.
Yet what fighting force could hope to dislodge the Invid hordes from Haydon IV, ethereal world of superscience and hidden emotional conflict; or Spheris, crystalline globe of living minerals and murderous resonances?
The Sentinels launch their attack nevertheless; they've come too far to surrender to tyranny. But the treachery of a megalomanic Human general and a mutating Invid P.O.W. make the war seem hopeless.
The Sentinels battle on, though, because for them it's...
Victory or Death!