Python An Introduction to Programming
James R. Parker
Mastering pfSense, Second Edition
David Zientara
SELinux User's and Administrator's Guide
Mirek Jahoda & Barbora Ančincová & Ioanna Gkioka & Tomáš Čapek
Land of Lisp
Conrad Barski M.D.
SQL Pocket Guide
Jonathan Gennick
Practical SQL: A Beginner’s Guide to Storytelling with Data
Anthony DeBarros
Learning SQL
Alan Beaulieu