Spoils from today! Found them at a old bookstore selling each for 3 reais (more or less 1.50 usd) each and couldn’t resist to buy them. Having read the Foundation series and the sequels, I had not yet adventured into the prequels Prelude to Foundation and Forward the Foundation; now I can and will.
But what catched my eyes at the bookstore was that 2001 one. I have read its sequel — 2010 — and watched the movie, but I’m still to read the original Clarke novel.