Following are the recommended books for the Preparation of IIT JEE :
Principles Of Physics (By Halliday, Resnick & Walker)
Use this book for reading theory only. The concepts are explained in detail and are easy to grasp. But be careful, some of the topics given in this book are not included in the JEE syllabus.
Concepts Of Physics (By Dr. H C Verma) Vol. 1 Vol. 2
This book should be followed religiously. First read the theory section twice and make notes, then do the Worked Out Examples – try to solve the examples yourself before looking at the solutions given in the book. Next, move to Objectives and Exercises. Though many unauthorized solutions of Concepts of Physics are available but don’t buy them as they contain many errors.
Mathematics For Class XI & XII (By Dr. R D Sharma)
Use this book to familiarize yourself with new formulae and concepts. No need to do all the exercise questions given in this book (there are too many questions of the same type), just do enough questions so that you learn how to apply the basic concepts.
Problem Plus In IIT Mathematics (By A Das Gupta)
Use this book only after you have understood the basics well. First do a chapter from your basic textbook and after completing that start the same chapter from this book. This is a slightly difficult book so don’t get disheartened if you are not able to do the problems at the first go.
Chemistry For Class XI & XII (By NCERT)
Concise and compact books. Do from the beginning to the end.
Organic Chemistry (By Morrison & Boyd) & Organic Chemistry (By Solomons & Fryhle)
Reference books for organic chemistry. Use these books for reading theory only. All concepts are explained in good detail. But be careful, many topics given in these books are not included in the JEE syllabus.
Concise Inorganic Chemistry (By J D Lee)
Reference book for inorganic chemistry. Use this book for reading theory only. All concepts are explained in a lucid manner. But be careful, many topics given in these books are not included in the JEE syllabus.
For All Subjects
Do Exercise sheets of Bansal Classes or Resonance or FIIT JEE or Career Point or Vibrant Academy.
I found that the exercise sheets used by these coaching institues for their classroom courses were far better than the correspondence courses provided by them. You can buy these exercise sheets at most booksellers.