Spock's World Diane Duane Spock's World Diane Duane · 2000 First published 1 year later Save Continue from here
Second Foundation Isaac Asimov Second Foundation Isaac Asimov · 2004 First published 5 years later Save Continue from here
Foundation and Empire Isaac Asimov Foundation and Empire Isaac Asimov · 2004 First published 5 years later Save Continue from here
