"Memoirs found in a bathtub" by Stanislaw Lem. Printouts preserved in mud deep in a fictitious pentagon basement for thousands of years after nuclear holocaust wipes computer memories.
The star diaries are my favourite, more whimsical. I'm very fond of his robot stories. I've never re-read the Memoirs, they were .. very unsettling. As was the futurological congress. Solaris is too overlayed by the Tarkovsky film for me now, i used to make shredded paper to hang in my office airvents as a homage.
