UNIX and Linux System Administration Handbook
Evi Nemeth & Garth Snyder & Trent R. Hein & Ben Whaley
Beginning Ubuntu for Windows and Mac Users
Nathan Haines
Learning Python
Mark Lutz
Kali Linux Assuring Security by Penetration Testing, Fourth ...
Shiva V. N Parasram
Refactoring UI
Adam Wathan & Steve Schoger