Judging from my own experience of reading such serious science books, it may be important to gain readers' attention by some measures like nice design, adequate amount of book, and easy vocabularies. At my first glance through this small and thick book, the contents seem to be too much for readers to concentrate. As a whole, this must be one of Barrow's magnificent books. Especially, the subtiles with the quotations of the famous persons are very impressive. This book also leads me to more deeply understand what made me confusing in terms of some new cencepts. I hope his another version of simpler edition will come to public sooner or later.