Thank you everyone for your suggestions and recommendations. I have not purchased a book as yet. I think I will purchase Singhania or TN Manoharan. Another question is TN Manoharan the new President of ICAI?
Definitely purchase TN Manoharan for IT and NS Govindan for CST Both are more interactive and conceptual But you cannot expect some analytical problems. Because for PE2 Analytical problems are not expected. Working knowledge is the requirement.
Anyhow you have to prepare your ouwn notes for get through the exam
Just swallow the RTP and recent amendments. Definitely you will get 50.