Ca final- idt

i have taken idt coaching from CA RAJ KUMAR Sir. my exams due in may 2015. i want to score exemption in idt. pls suggest me whether my class notes are sufficient for idt or i should refer some other material. i want to score exemption in ISCA also. I have started self study from dinesh madan sir book . is this book is perfect for score exemption in isca or i should refer some other book . pls suggest me as soon as possible. Thanks in advance