Well all would recommend various authors like:
1. Ashish Kalra book
2.Mohit Jain
3.Sanjay Saraf etc
But what i say is refer any book, but get your conepts clear, very clear , study the study material(modules) which u get at the time of registration, and then choose wisely any refrence manual.
Remember at the end of the day it's YOU who's gonna write the paper not those authors !
Regards.
Ps: This was not to offend anyone, these views are subject to only me and I personally recommend ICAI study materials on the first place.