prefrence self study books for ipcc exam

You don't need to prefer any other books .. institute books are enough and follow swapnil patni sir for ITSM
Neeraj arora sir for tax and audit
ankita patni ma'm for law...
and books , give first preference to institute material n pm .. you can refer munish bhandari book for law and manish valecha book for itsm..
i don have any idea of remaining coz i prefered institute books only..

Accounts - Praveen Sharma class notes or DG sharma Video lactures

FM Costing  - Padhuka

Law - Munish Bhandari handbook

Tax - T N manoharan or audit

Audit - Surbhi Bansal or Neeraj Arora or Pankaj Garg

ITSM - Manish Valechha plus PM

The study material or Module of IPCC is good enough. I never purchased other books. However, I borrow books from my seniors, CA articleship students & teachers. For recent updates & amendments, the mails I recieve from ICAI are good. Any additional information is available online.