I am currently reading "Thor" by German author Wolfgang Hohlbein; I received it as a birthday present from my parents; they have the false impression that I like Fantasy as a genre because I like Pratchett and Stanislaw Lem. Lem is generally regarded as Sci-Fi, which is totally off the mark in my opinion, but for my parents Sci-Fi and Fantasy are one and the same, in essence "books about things which are not". The book is so-so; I have read better and I have read worse.
Stanislaw Lem is a must-read for all lovers of Pratchett. Unfortunately I can't read him in Polish, but most of his books have been translated into German. Sadly (for users of the forum) this can not be said for Engöish translations of Lem; there still is quite a gap there.
I would love to be able to read Lem in Polish; his books are full of wordplay, and, having been a translator myself for several years, I am all to well aware that much of it gets lost in translation.