Hello Applicant!!

If you wish to take honest review, a 40 days book is not going to help you crack the exam unless you invest profound time of yours, you prepare for at least one year, it is very difficult to make it through. Now coming to the book, yes it is good if you only wish to practice the MCQs however it is more preferable to practice MCQs by appearing in frequent test series conducted by different Educational institutions.

Hope it helps!!!