Cyberiada.

OMG I can't believe there's no description for this - but then I can because this book defies description. Stanislaw Lem is a genius and your minds will be expanded to bursting when you begin this journey into a world where machines are the dominant species. It is hugely entertaining, inventive, witty, and above all, laugh out loud funny. The book concerns two "constructors" - Trurl and Klaupacious who build machines, and who are in fact machines themselves. Find out what happens when Trurl builds the world's stupidest computer, and Klaupacious' machine that can do "anything in N" nearly ends the universe.