Some government digital libraries (like NDL India) provide access to competitive exam books. Check with your local university.
Here is the content formatted properly for study or conversion to PDF. You can copy this text into Microsoft Word, Google Docs, or any text editor, then save/export as PDF. lucent gk pdf format
If you already own the paperback, you can legally create a personal PDF for backup. Here’s the best method: Some government digital libraries (like NDL India) provide