[cubefox]

I read pretty much all of his books. My favorite is "Wizja Lokalna", I've read the German translation, but there is no English one. Other books of his are available in English though: I like The Cyberiad and The Star Diaries, both quite funny. The former is about the adventures of the two great robot constructors Trurl and Klapaucius, the latter about the journeys of Ijon Tichy, a kind of space Munchausen. Tichy also plays the main role in the the later books The Futurological Congress, Peace on Earth, and "Wizja Lokalna" (which doesn't have a translation, as I said.) All these novels are often quite funny, unlike Solaris.

He has also written other great but much more unusual books, such as Memoirs Found in a Bathtub (a Kafkaesque story set inside an underground Pentagon which was cut off from the rest of the world) or A Perfect Vacuum (a collection of reviews of books which do not exist.)