I come to know that u torrent is a software you have to download and then you can download any software or book from the internet. I want some more detail about this.
Yes, this is one way. Search for any book and add the word at the end of it "torrent" and hit enter. open the torrent site and download that torrent, select the files you want to download before confirming and wait some time depending on size and speed of internet connection as well as number of seeds. However all the books, software etc available is pirated means that you are stealing it from the author. Think of it as if you wrote a book yourself after months of hardwork and than instead of buying it people can just download it for free, how would you feel?
Try any of these http://en.wikipedia.org/wiki/Bookglutton