Short answer: Use updated bare acts, a few standard commentaries and previous papers, and check the syllabus of your state.
Bare acts
Use the latest published version and note amendments.
Commentaries
Use a few standard texts rather than many.
Papers
Solve previous papers of your state to learn the pattern.
Frequently asked questions
Do syllabi differ by state?
Yes, check the notification for your exam.
Are old bare acts fine?
Check amendments; prefer recent publications.