Cosmic Castaway
Author: first_name: Carl Richard
last_name: Jacobi
Language: English
Year: 0

"Within a year Earth would be a vassal world,  with the Sirian invaders triumphant. Only Standish, Earth's Defense Engineer, could halt that last victorious onslaught—and he was helpless, the lone survivor of a prison ship wrecked in uncharted space." - Summary by publishers blurb