Hi aspirant!

Before solving the questions from any advanced level or reference book, make sure that you have good grip over your concepts/fundamentals. Cangage is a good book and covers questions of almost each type. It also contains a good number of questions, but there are many cases in which a student loses interest in the subject by solving same type questions on same topic. So, I'll suggest you to skip the questions of same type and cover more questions of different patterns or concepts. Also, the book contains solutions for each question, I'll recommend you to solve the questions without seeing the answer, this will help you making your thinking process better.

Thankyou!