grep Pocket Reference
John Bambenek
Wireshark for Security Professionals
Jessey Bullock & Jeff T. Parker
Essential System Administration
Æleen Frisch
White Space Is Not Your Enemy
Rebecca Hagen & Kim Golombisky
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain