CA Ajain Jain book for IDT

hi my name is jahnvi n I am about to start studying for IDT. I plan to study IDT from Ajay Jain"s books...but  I find it incomplete n short...I have also seen Bangar...but dont intend to study from it...please recommend as to which one is better from examination point of view...Is Ajay Jain enough?

hi my name is jahnvi n i intend to start studying for IDT soon. I wish to study from Ajay Jains books. But I find it incomplete n in-short...I have also seen Bangar but i dont intend to study from it. Is ajay jains book eough for IDT or is Bangar a must?