The End of Eternity (1955) by Isaac Asimov. 1958 cover by Richard Powers.
Ralph McQuarrie positronic robots Illustrations for Isaac Asimov Robot Vision.
Foundation by Isaac Asimov (April 2013 Sci-Fi Book Club Read)
www.CuratedScienceFiction.com | The Gods Themselves *** For The Sci Fi Lovers Be Sure to check out Nathan Walsh's Dark Science Fiction Novel, "Pursuit of the Zodiacs." - will be Available soon At: PursuitoftheZodiacs.com ***