Yes, it is good for JEE preparation to clear IIT JEE but for Main you should go for H C Verma or DC Pandey. 

Cengage covers many solved examples for your practice. There are unsolved exercises as well for your practice. This book is basically for advanced level.

To crack your exam make sure your basics are clear. If you have your base strong you can easily solve any type of questions. NCERT books are best to make your fundamentals strong.

It is highly recommended that you should also refer to past year problems to understand the level of questions and as much as MCQs as well for your practice.

All the best for your exam!!