The answer, as always at B2 level, is nuanced.
| Aspect | Official book (print or e-book) | Pirated PDF | |--------|--------------------------------|-------------| | | Access via QR codes or Didier's app | Usually missing (static document only) | | Answer keys | In separate teacher's book | Often included by mistake, harming self-assessment | | Updates | New editions reflect CEFR tweaks | Frozen, often outdated | | Legal tracking | None | Potential malware from shady sites |