1.
CentOS 7 Linux Server Cookbook - Second Edition
by Pelz, Oliver, Hobson, Jonathan
ISBN: 9781785887284
List Price: $49.99
2.
Linux: Powerful Server Administration
by Uday R. Sawant, Oliver Pelz...
ISBN: 9781788293778
List Price: $99.99
3.
Fundamentals of Linux: Explore the essentials of the Linux command line
by Oliver Pelz
ISBN: 9781789530957
List Price: $29.99