The Book of R
Tilman M. Davies
Docker: Up & Running
Sean P. Kane & Karl Matthias
Android Programming for Beginners - Second Edition
John Horton
Learning PHP 7 High Performance
Altaf Hussain
SELinux User's and Administrator's Guide
Barbora Ančincová & Ioanna Gkioka & Tomáš Čapek & Mirek Jahoda
Saltstack Documentation - Release 2019.2.1
SaltStack, Inc.