Forsaken Commander by G J Ogden

Humanity’s only hope is the commander they spurned…

Once, Master Commander Carter Rose was the Union’s secret weapon. An augmented, bio-engineered officer in command of the most powerful warship ever devised by human minds, Rose brought them victory against the post-human Aternien Empire.

Then they cast him aside.

A century later, humanity’s enemy has returned, hell-bent on revenge, and the Union’s only hope is the man they had forsaken.