Itsm

Better prepare from study module

But for reference u can use

Adv acc- P.C. Tulsian

Audit- Surbhi Bansal

IT/ SM - Dinesh Madan

But pls see that bks are all updated

and go through Companies Act, 2013

I feel don't go for Author's book. Institute give marks if you write language & contents of modules. Institute loves its module. prepare throughly.