In what order should one read Isaac Asimov's Foundation novels?

The author's suggested reading order of Asimov's Foundation series

What order should Asimov's Foundation series be read in? In the order in which the events take place in the story, or in the order in which the books and stories were written? In the "Author's Note" at the beginning of "Prelude to Foundation", Asimov says that when he wrote "Foundation" he had no idea that he had begun a series of stories that would eventually grow into seven volumes, and a total of approximately 700,000 words. Nor did he have any idea that it would be unified with his stories involving robots and the Galactic Empire. It's a grand total of 15 volumes and about 1,500,000 words. Foundation was originally a series of eight short stories published in Astounding Magazine between May 1942 and January 1950. In the same note Asimov provided a guide, since the books "were not written in the order in which (perhaps) they should be read." Therein, he offers the following order: • The Robot Series 01. I, Robot (1950, Collection of Short Stories) 02. The Caves of Steel (1954, The first Robot novel) 03. The Naked Sun (1957, The second Robot novel) 04. The Robots of Dawn (1983, The third Robot novel) 05. Robots and Empire (1985, The fourth and final Robot novel) • The Empire Series 06. The Currents of Space (1952, The first Empire novel) 07. The Stars, Like Dust (1951, The second Empire novel) 08. Pebble in the Sky (1950, The third and final Empire novel) • The Foundation Series 09. Prelude to Foundation (1988, The first Foundation novel) 10. Forward the Foundation (1993, The second Foundation novel and the last to be written) 11. Foundation (1951, The third Foundation novel, comprised of 5 stories originally published between 1942-1949.) 12. Foundation and Empire (1952, The fourth Foundation novel, comprised of 2 stories originally published in 1945) 13. Second Foundation (1953, The fifth Foundation novel, comprised of 2 stories originally published in 1948 and 1949) 14. Foundation's Edge (1982, The sixth Foundation novel) 15. Foundation and Earth (1986, The seventh Foundation novel)
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Portrait of Asimov enthroned with symbols of his life's work, by Rowena Morrill.
Instead, the chronological order in which the books and stories were written is: 01. I, Robot (1950, Collection of Short Stories) 08. Pebble in the Sky (1950, The third and final Empire novel) 07. The Stars, Like Dust (1951, The second Empire novel) 11. Foundation (1951, The third Foundation novel, comprised of 5 stories originally published between 1942-1949.) 06. The Currents of Space (1952, The first Empire novel) 12. Foundation and Empire (1952, The fourth Foundation novel, comprised of 2 stories originally published in 1945) 13. Second Foundation (1953, The fifth Foundation novel, comprised of 2 stories originally published in 1948 and 1949) 02. The Caves of Steel (1954, The first Robot novel) 03. The Naked Sun (1957, The second Robot novel) 14. Foundation's Edge (1982, The sixth Foundation novel) 04. The Robots of Dawn (1983, The third Robot novel) 05. Robots and Empire (1985, The fourth and final Robot novel) 15. Foundation and Earth (1986, The seventh Foundation novel) 09. Prelude to Foundation (1988, The first Foundation novel) 10. Forward the Foundation (1992, The second Foundation novel and the last to be written)