AD&D 5th Edition - Xanathar's Enemies and Allies
Dungeon Master's Guild Adepts
Real-World Bug Hunting
Peter Yaworski
Linux Basics for Hackers
OccupyTheWeb
AD&D 5th Edition - Wayfinder's Guide to Eberron (v3)
Wizards of the Coast
Unix Power Tools
Shelley Powers
Network Programmability and Automation
Jason Edelman & Scott S. Lowe & Matt Oswalt
Linux System Programming
Robert Love
Linux Device Drivers
Jonathan Corbet & Alessandro Rubini & Greg Kroah-Hartman
Learning the Vi and Vim Editors
Arnold Robbins & Elbert Hannah
Effective Awk Programming
Arnold Robbins
Docker: Up & Running
Sean P. Kane & Karl Matthias
Cybersecurity Ops with bash
Paul Troncone & Carl Albing Ph.D.
Classic Shell Scripting
Arnold Robbins & Nelson H. F. Beebe
Bash Cookbook
Carl Albing & JP Vossen
Black Hat Go
Tom Steele & Chris Patten & Dan Kottmann