Written 60 years ago by the master of SF and initiator of the literature on robots, this book surprises with the imagination of the time, and each chapter is an enigma of vision robots, with very interesting puzzle solution report to law robots. And indeed we get tired of this old vision. So yes, in comparison to Isaac Asimov for this remarkable and interesting imagination. Yes, in 2014 this collection of stories we seem quaint. Read wistfully.