RT Essentials
Richard Foley
RHSA III
Wander Boessenkool, Chen Chang, Will Dinyes, George Hacker, ...
Red Hat System Administration (3)
An Introduction to Linear Algebra
Ravi P. Agarwal & Elena Cristina Flaut
Black Hat Python: Python Programming for Hackers and Pentesters
Justin Seitz
A Brief History of Time
Stephen Hawking