Galactic empires trilogy

Joseph Schwartz is a happily retired Chicago tailor in 1949 Chicago. Trapped in an incredible future he could barely comprehend, the unlikely time traveler would soon become a pawn in a desperate conspiracy to bring down the Empire in a twist of agony and death: a mad plan to restore Earth's tarnished glory by ending human life on every other world.--

Subjected to mind erasure because he warns of impending disaster on the planet Florina, the earthman Rik battles unknown foes and memory loss to avert mass destruction.