But we should go back to the old ways in math!
Classic 1939 book on graphs in its entirety available free online.
Willard Cope Brinton is credited as one of the pioneers of information visualization. His 1939 book Graphic Presentation is available in its entirety at the Internet Archive. You can download it in various formats. The book was an update to his previous book from 25 years prior, Graphic Methods for Presenting Facts. It's also at the Archive.