There are many good things about this book - the theorems are beuatiful and they are part of 'real' mathematics. The writing is reasonably good. The only qualm I have is that the audience is quite specialized, more so than for most 'popular math' books. I think that anyone who has not had at least 3 semesters of calculus will find this mostly meaningless. However, for those who are familiar with calculus, this is an excellent book.