I am in class 12 and need books for IIT JEE preparation. How should I buy these books if in the below website, few important books cover different topics especially in math?http://www.askiitians.com/important-books-iit-jee.aspx#askq

YOU CAN CLICK ON THE NAME OF THE BOOK YOU WANT TO BUY . JUST CLICK ON THE NAME OF BOOK. THEN CLICK ON THE OPTION  buy now. you will be directed to the page. just fill the details . enjoy the books . happy learning

Im sorry, thats not what I meant. I was asking what all books would be required. For example, in math, SL Loney cevers Trigonometry and coordinate geometry, Hall&Knight covers higher algebra and Arihant covers Calculus. So would I have to buy all or is there an alternative?

Just buy Arihant books of calculus, algebra and coordinate geometry for Maths.It’s more than enough. Don’t run after the books otherwise, you will be confused at the end of the day which book to solve.