Isaac Asimov wrote a complete 7 volume series of Foundation novels, an interesting Empire prequel series, and compiled short stories and novellas into a Robot prequel series to make a vast and arching future history for our universe. But at it's core were the first three compiled and original stories that made a trilogy of the Seldon Plan and its unfolding. If you want a spoiler free, first look into this classic series, let's read the first three books together in one month.