Wer der englischen Sprache mächtig ist und eine interessante Auswahl an Bücher über Linux sucht, könnte bei dem Humble Book Bundle: Linux by Wiley 2019 fündig werden:

Pay $1 (about €0.89) or more to unlock!

Linux Essentials
Second Edition

Ubuntu Linux Toolbox: 1000+ Commands for Power Users
Second Edition

Linux All-In-One For Dummies
Sixth Edition

Beginning Linux Programming
Fourth Edition

Pay $8 (about €7.10) or more to also unlock!

Linux Bible
Ninth Edition

Shell Scripting: Expert Recipes for Linux, Bash, and more

Linux Server Security: Hack and Defend

CompTIA Linux+ and LPIC Practice Tests: Exams LX0-103/LPIC-1 101-400, LX0-104/LPIC-1 102-400, LPIC-2 201, and LPIC-2 202

Professional Linux Kernel Architecture

Pay $15 (about €13.30) or more to also unlock!

Linux Command Line and Shell Scripting Bible
Third Edition

CompTIA Linux+ Powered by Linux Professional Institute Study Guide: Exams LX0-103 and LX0-104
Third Edition

LPIC-1: Linux Professional Institute Certification Study Guide: Exams 101 and 102
Fourth Edition

LPIC-2: Linux Professional Institute Certification Study Guide: Exams 201 and 202
Second Edition

Red Hat Enterprise Linux 6 Administration: Real World Skills for Red Hat Administrators

Assembly Language Step-by-Step: Programming with Linux
Third Edition

Auch das Strategy Bundle 2019 ist für Linuxer sicherlich einen Blick wert.