14 February 2017
All the private authors books are carved out from ICAI study material. Manish Valecha is a book based on Memory Techbique, Dinesh Madan book is concise edit from ICAI material.
I personally believe, you must study from ICAI study material and while preparing you must be mugging up both the questions as well as the answers. In ISCA when you are seated in the Exam Hall, you are going to be very confused if you do not know the contents which is asked in the exam for which question, thus importance of re-collecting question along with answer is absolutely imperative.
14 February 2017
Very well explained Sathish. This happened to many students in past when they know the answers but not sure about the question. Also, many have experienced getting blank in exam hall and hence sound memory technique is important to recall answers in exam hall. One also need to have a proper revision plan particularly for ISCA.