Foundation and Earth sees Golan Trevize of the Foundation, with his friend Janov Pelorat, and a Gaia-Being Bliss, on a quest to decide the future of the Galaxy. Trevize is trying to make the momentous choice between the First Foundation, the Second Foundation, and Gaia.

Foundation's Edge, set 498 years after the First Foundation, sees a young Councillor exiled to find the rumored Second Foundation and uncover its influence on galactic history.

The excerpts from "Second Foundation" detail the Foundation's struggles against the Mule and their subsequent search for the elusive Second Foundation. The story culminates in the discovery that the Second Foundation is secretly located on Trantor, working to ensure the success of Seldon's Plan.

The Foundation faces the unexpected rise of the Mule, a mutant with mental powers who threatens their planned future and the emerging Second Empire.

Hari Seldon foresaw the Galactic Empire's fall, prompting the establishment of the Foundation on Terminus to compile the Encyclopedia Galactica. Early leaders like Salvor Hardin and Hober Mallow navigated political and economic crises.

Hari Seldon arrives on Trantor and begins his work on psychohistory, facing initial skepticism and political complexities. His ideas attract both interest and opposition.

Hari Seldon strives to perfect psychohistory to save a crumbling Galactic Empire, facing political turmoil and establishing the Foundation with his granddaughter Wanda.

Spacer-Settler tensions escalate, influenced by Elijah Baley's legacy, as Gladia interacts with Settlers, and robots Daneel and Giskard face a planetary crisis.

Elijah Baley on Solaria finds its vast, sparsely populated landscape and robot-dominated society unsettling due to his Earthman sensibilities.