"...our school Curricula, by stripping mathematics of its cultural content and leaving a bare skeleton of technicalities, have repelled many a find mind. It is the aim of this book to restore this cultural content and present the evolution of number as the profoundly human story which it is"
Such were the comments of Tobias Dantzing about his book, Number, The Language of Science, the book of which Einstein said, "This is beyond doubt the most interesting book about the evolution of mathematics which has ever fallen into my hands.
If you have never read it, peruse the preview at Google Books, and maybe pick it up at Amazon... In my mind, it is a book for teachers to read every summer.