What an awe inspiring and almost "Religious" experience it is to delve down into what may well be the ultimate origin of "all things reality".<br><br>This book is a wondrous journey through what has been a series of evolving theories first known as String Theory (theories really) and then presently as M Theory.<br><br>The idea that all of creation in all of its manifestations might actually boil down to nothing more than shattered little shards of space that vibrate within a multiplicity of dimensions, thereby attaining all of the properties of energy, matter, space itself, or even gravity.....this is as good as it gets for the intellectually curious reader.<br><br>There has, in my estimation been no other writer to approach the ability of Carl Sagan to relay the majesty of the universe in scientifically yet poetically powerful terms. Brian Greene has come the closest to doing such that I have yet found. Do not miss this book. Nor ought you miss Fabric of the Cosmos, also by this author which is a close second to The Elegant Universe.