Vedic Mathematics Secrets

The name of the author is not at all clear.
But : Clearly outstanding, and resourceful.
Mostly interesting for the history of mathematics, as modern algebra goes much farther that these collection of extraordinary 'rules'
From the book : 'The present volume, even though introductory, has touched almost all the Sutrasand sub-Sutras as mentioned in Swamiji's 'Vedic Mathematics'. Further it has given rationale and proof for the methods. As there is a general opinion that the 'so called Vedic Mathematics is only rude, rote, non mathematical and none otherthan some sort of tricks', the logic, proof and Mathematics behind the 'the so called tricks' has been explained. An impartial reader can easily experience the beauty, charm and resourcefulness in Vedic Mathematics systems. We feel that the reader can enjoy the diversity and simplicity in Vedic Mathematics while  applying the methods against the conventional textbook methods. The reader can also compare and contrast both the methods.'