Which book should be prefer for isca?

Hii, I want to know that which book should be refer for ISCA? Earlier I preferred Dinesh Sir notes(refered his book side by side)and Scanner but I hardly got 37 marks. I accept I forget many of the points in the exams. what should I do to overcome this problem still last time I revised all topics 2 times. This time I am going to prefer Dinesh Sir Book , Practice Manual and RTPs. Is M doing correct by referring above. Please give suggestions.