Many successful candidates sell their original Allen modules at a fraction of the cost on platforms like Olx, Quikr, or local bookstores. Physical copies are often better for highlighting and note-taking.

Many coaching institutes provide free "Sample Chapters" or "Daily Practice Problems (DPPs)" on their official websites or apps to help students get started.

When searching for "patched" PDFs or unofficial downloads, students often encounter several risks that can hinder their preparation: