Absolute FreeBSD
Michael Warren Lucas
Quick Start Guide to Penetration Testing
Sagar Rahalkar
C++ Crash Course
Josh Lospinoso
Penetration Testing with Kali Linux OSCP
Offensive Security
Asterisk: The Definitive Guide
Jim Van Meggelen & Russell Bryant & Leif Madsen
Building Secure and Reliable Systems
Heather Adkins & Betsy Beyer & Paul Blankinship & Piotr Lewandowski & Ana Oprea & Adam Stubblefield
Kubernetes Patterns
Bilgin Ibryam & Roland Huß
Kubernetes: Up and Running
Brendan Burns & Joe Beda & Kelsey Hightower & Lachlan Evenson
Linux Networking Cookbook
Carla Schroder
NGINX Cookbook
Derek Dejonghe