Start with high-confidence data viz books, then narrow by subgenre or adjacent topics.
Power of People, the
Nigel Guenole, Jonathan Ferrar
Persuading With Data
Miro Kazakoff
Storytelling With Data
Cole Nussbaumer Knaflic
Avoiding Data Pitfalls
Ben Jones
The Big Book of Dashboards
Steve Wexler, Jeffrey Shaffer
Microsoft Power BI for Dummies
Jack A. Hyman
R All-in-one for Dummies
Joseph Schmuller
Visualize This
Nathan Yau
Data Storytelling in Marketing
Caroline Florence
Introducing Data Science
Davy Cielen, Arno Meysman
Gnuplot in Action
Philipp K. Janert
Python Tools for Scientists
Lee Vaughan