Stanislaw Lem. Lem’s books are available on Amazon, but I don't know which one of his novels would I like?
Solaris...Americans made a film from this Lem's book ;)
Who are best-selling Polish writers?
You can try Andrzej Sapkowski. Do you know the video game called "The Witcher" ? It's from a Sapkowski's "saga". The first book is "The Last Wish", i read it, and enjoyed it :)