Modern Operating Systems
Andrew S. Tanenbaum & Herbert Bos
Time Management for System Administrators
Thomas A. Limoncelli
PostgreSQL for Data Architects
Jayadevan Maymala
Networking for Systems Administrators (IT Mastery) (Volume 5)
Michael W Lucas
In the Skin of a Jihadist: A Young Journalist Enters the ISIS ...
Anna Erelle & Erin Potter