: Use a tool like Recoll to make the text inside the PDFs searchable.

: Early O'Reilly or Packt guides on Pandas and Scikit-Learn.

: Collecting 50 books on Django, Flask, and NumPy creates a "safety net" of information.

: Run the archive through VirusTotal before extracting.

: Introductory texts like Automate the Boring Stuff , Python Crash Course , and Learning Python .

: Books on cryptography, socket programming, or game development with Pygame.