In my opinion, Michael W Lucas is one of the best tech writers working today. I have made great use of his books Absolute OpenBSD, SSH Mastery, and Httpd & Rela

In my opinion, Michael W Lucas is one of the best tech writers working today. I have made great use of his books Absolute OpenBSD, SSH Mastery, and Httpd & Relayd Mastery. He also wrote Absolute FreeBSD and PGP & GPG: Email for the Practical Paranoid, among many others.