The Robots of Dawn

You can tell that this book was written after Foundation. Similar to Foundation’s Edge, the book is tied much more clearly to the greater Foundation universe, and although it continues the Earth/Spacer political struggle, it also acts as a sort of origin story of psychohistory, and confirms some details of the story of Gaia. I do feel that Giskard’s mind-reading wasn’t as satisfyingly foreshadowed as previous twists.