Frnds i know many of the jntu prescribed text books r available in google BOOK SEARCH but they wont allow us to download them....but with this simple trick u can download ur desired text book from books.google.com....
just use GOOGLE BOOK DOWNLOADER to download ur desired textbook in pdf format its a wonderful tool for us..
NOTE: U SHOULD INSTALL .NET2.0 THEN ONLY IT WORKS..
HERE IS THE DOWNLOAD LICNK FOR THE SOTWARE: