Hi,

The Cengage series of books is by far the most comprehensive guide for JEE preparation I would strongly recommend you to do all the books in this series, but only if you are doing a correspondence course or aren't taking any coaching from one of the big JEE hubs.

However if you have joined an institute like FIITJEE or ALLEN, you will be better of concentrating on the packages given by them.

To sum up I think that Cengage series books are simply excellent for preparing for Advanced. All the subjects have excellent content and good questions.