Instead of a direct PDF, the most reliable and legal way to view the contents for free is through educational platforms and digital archives:
Finding a complete, high-quality "free PDF" of Leonardo da Vinci's Codex Leicester
Since you are using Google anyway, go directly to Google Arts & Culture.
Instead of a direct PDF, the most reliable and legal way to view the contents for free is through educational platforms and digital archives:
Finding a complete, high-quality "free PDF" of Leonardo da Vinci's Codex Leicester Leonardo Da Vinci Codex Leicester Pdf Free - Google
Since you are using Google anyway, go directly to Google Arts & Culture. Instead of a direct PDF, the most reliable