Hands On Maths by Arvind Gupta is an interesting book about math knowledge that you will like to read. This is an amazing book that containing a much general and advanced knowledge about maths covered within only 66 pages. You learn new things about maths in a funny and more playful way. You can read the book online here and also can download the PDf file from here for free. The PDF file size of the book is 8.6 Mb.