Best Book

i think paduka (final ca)is nice coz i hv started it n i find it easy to learn .it also has fast track refrencer which is  too good.also if u r from mumbai u can take J K Shah's notes of PE ii just as refrencer for company audit .it is has nice case studies.
 

Padhuka is good.

But in case u dont hav so much time , u can refer surbhi bansal notes.