PGP & GPG: Email for the Practical Paranoid
The Official PGP User's Guide
Tor and the Dark Art of Anonymity: How to Be Invisible from NSA Spying
Mastering Bitcoin: Unlocking Digital Cryptocurrencies
TCP/IP Network Administration (3rd Edition; O'Reilly Networking)
C++ Primer Plus (6th Edition) (Developer's Library)
Nmap Network Scanning: The Official Nmap Project Guide to Network Discovery and Security Scanning
Learning Python, 5th Edition
Data Science from Scratch: First Principles with Python
How to Disappear: Erase Your Digital Footprint, Leave False Trails, And Vanish Without A Trace