Windows Group Policy Troubleshooting: A Best Practice Guide ...
Kapil Arya
The Practice of System and Network Administration
Thomas A. Limoncelli & Strata R. Chalup & Christina J. Hogan
The Practice of System Administration (1)
Puppet Best Practices
Chris Barbour
Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
The Art of Computer Programming: Sorting and Searching
Donald E. Knuth
The Art of Computer Programming (3)