you can also refer uttamprakash agarwal and mahesh gours book for IDT for CA final. book is too good and covers PM and past exam questions also.yes there are some errors but still it is good because if you can get 60+ marks by reading 550 pages then why you refer bangar which contains around 750 pages excluding compiler which contains around 450 pages.
Nothing is better than combination of latest pm+ ICAI supplementary+RTP& its caselaws in dt & Idt in my view, but u have ask for any author's book then in my view in IDT Bangar is good.