Git Essentials
Ferdinando Santacroce
Networking for Systems Administrators (IT Mastery) (Volume 5)
Michael W Lucas
Automation Through Chef Opscode: A Hands-On Approach to Chef
Navin Sabharwal & Manak Wadhwa
Linux Bible
Christopher Negus & Christine Bresnahan
Information Doesn't Want to Be Free: Laws for the Internet Age
Cory Doctorow & Amanda Palmer & Neil Gaiman