Python for Unix and Linux System Administration
Noah Gift & Jeremy Jones
Mastering Chef
Mayank Joshi
CEH Certified Ethical Hacker Study Guide
Kimberly Graves
PostgreSQL Replication
Zoltan Boszormenyi & Hans-Jürgen Schönig
The Book of PF: A No-Nonsense Guide to the OpenBSD Firewall
Peter N. M. Hansteen