Start with high-confidence computer networking books, then narrow by subgenre or adjacent topics.
UNIX for Programmers and Users
Graham Glass, King Ables
CompTIA Network+ N10-009 Exam Cram
Emmett Dulaney
CompTIA Network+ N10-008 Cert Guide
Anthony J. Sequeira
Microsoft Azure Networking
Avinash Valiramani
Practice of System and Network Administration, the
Thomas A. Limoncelli, Christina J. Hogan
Network Troubleshooting Tools
Joseph Sloan
Linux Networking Cookbook
Carla Schroder
CompTIA A+ Certification All-in-one for Dummies
Glen E. Clarke, Edward Tetz
Data Center Handbook
Hwaiyu Geng
Networking All-in-one for Dummies
Doug Lowe
SDN: Software Defined Networks
Thomas Nadeau, Ken Gray
Network Warrior
Gary Donahue
Arista Warrior
Learn Linux in a Month of Lunches
Steven Ovadia
How Linux Works, 3rd Edition
Brian Ward
