| Feature | PDF (Free/Cheap) | Physical Book (Motilal Banarsidass) | | :--- | :--- | :--- | | | Excellent (Ctrl+F) | Poor (flip pages) | | Portability | 1000 pages on a phone | Heavy, 2 volumes | | Annotation | Difficult (requires software) | Easy (margins & sticky notes) | | Accuracy | Risky (scanned errors) | Guaranteed (published edition) | | Cost | $0 (or low) | $50-$80 |