This is an excellent book on mathematics. The author was an explendid human been and all his work were exceptionally powerful current of moral and spiritual enlightment.
The sixteen mathematical formulae found by the author in the great Indian Vedas are a powerful tools for everyone that uses mathematics in his life (I mean everyone who is alive!). The formulae helps in doing evey calculus and helps to brain exercise.
I bought the book from Amazon with a good price. The delivery was fast, near one month (I live in Brazil), two weeks less than the initial prevision.
I recomend the book, and Amazon.