To help you decide, here is a comparison between the illegal "free PDF" route and the legal routes:
| Feature | Illegal Free PDF (Scam Sites) | Legal Print / Paid E-book | | :--- | :--- | :--- | | Cost | "Free" (but costs your data/security) | ₹250 - ₹500 | | Safety | High risk of virus/malware | 100% Safe | | Quality | Blurry, missing diagrams, OCR errors | High-resolution, crisp text, accurate figures | | Searchability | Usually non-searchable scanned images | Fully searchable text (in e-book) | | Updates | Stuck on old edition | Access to errata and new editions | | Portability | Requires local storage | Cloud access (Kindle/Google Play) | | Legal Standing | Piracy (Potential fines) | Ownership | Operating System By P Balakrishna Prasad Pdf Free
If you're unable to find the specific book by P. Balakrishna Prasad, consider these alternatives: To help you decide, here is a comparison
The book typically covers the full gambit of a standard OS course, including: The free scanned copies are often of terrible quality
If you want a physical copy, sites like Amazon India, Flipkart, or BookChor sell used copies for as low as ₹150. That is cheaper than a pizza and completely legal.
The free scanned copies are often of terrible quality. You will find: