Foundation and Empire - Sequels

Sequels

• The sequel, Second Foundation, tells the rest of the Mule's story.
• In the fourth book in the series, Foundation's Edge, Asimov writes that the Mule had been a rogue member of the planet/society Gaia.
• The demise of the Empire's remnant on Trantor is told in "Trantor Falls" by Harry Turtledove in Foundation's Friends, a tribute collection.