https://en.wikipedia.org/wiki/Foundation_series#Prelude_to_Foundation
Prelude to Foundation (1988)
https://en.wikipedia.org/wiki/Prelude_to_Foundation
started off with this one. it was great and started to tie the robot series together with the foundation series
Forward the Foundation (1993)
https://en.wikipedia.org/wiki/Forward_the_Foundation
just a continuation of the first prelude book. predictable, but good.
Foundation (1951)
https://en.wikipedia.org/wiki/Foundation_(Isaac_Asimov_novel)
Started the actual og series. This is cool having read the first 2 books, but if I hadn't.. these would just be weird short stories wrapped in the mythos of a distant world. I liked the 3(?) stories in this one.
Foundation and Empire (1952)
https://en.wikipedia.org/wiki/Foundation_and_Empire
The first half is just another sheldon event like the ones above. Then it goes into a long story to expose the second foundation... well, it is 100% predictable. I was shouting at the end of the book because it was just that predictable. ugh.. it killed me. it was more predictable than the dors part of forward the foundation.
3 more books.