The author, one of the pioneers of string theory, has produced an accessible guide for the general reader to some of the most formidable modern concepts of math... » 

The author, one of the pioneers of string theory, has produced an accessible guide for the general reader to some of the most formidable modern concepts of mathematics and physics. These include string theory itself, hyperspace, non-Euclidean geometry, Kaluza-Klein theory and supergravity. «