Book recommendation about mathematics I'm looking for a book about mathematics, but not about calculus, algebra or any field of math. I want to read a book about the use of mathematics in the world, for example, Why is math so useful. Or maybe something about the point of view of a mathematician in the world or even a biographyy of someone math related.
 Any book related to math (but not with the theorems/definitions/integrals/etc) I will take in consideration. Thanks

Then what about start and reading about the historical development of math ?
For instance I found very interesting A History of Mathematics-Carl B. Boyer.
