grep Pocket Reference
John Bambenek & Agnieszka Klus
Linux Pocket Guide
Daniel J. Barrett
Practical Binary Analysis
Dennis Andriesse
AD&D 5th Edition - Wayfinder's Guide to Eberron (v3)
Wizards of the Coast
Web Security for Developers
Malcolm McDonald
Rootkits and Bootkits
Alex Matrosov, Eugene Radionov, Sergey Bratus
Real-World Bug Hunting
Peter Yaworski
Penetration Testing: A Hands-On Introduction to Hacking
Gorgia Weidman
Metasploit: The Penetration Tester's Guide
David Kennedy, Jim O'Gorman, Devon Kearns, Mati Aharoni
Linux Basics for Hackers
OccupyTheWeb
The Hardware Hacker
Andrew Bunnie Huang
Hacking: The Art of Exploitation
Jon Erickson
The Car Hacker's Handbook
Craig Smith
Black Hat Go
Tom Steele & Chris Patten & Dan Kottmann
Attacking Network Protocols
James Forshaw