Lem posited a question: what if we encounter an intelligence that is so non-human as to be unknowable? He explores this in "Eden", "Solaris" and "Invincible".

Lem posited a question: what if we encounter an intelligence that is so non-human as to be unknowable? He explores this in "Eden", "Solaris" and "Invincible". All three are highly recommended.