Designers everywhere are suddenly drooling over this 70-year-old book. Including me.
Someone needs to get me a paper copy of Willard Cope Brinton's Graphic Presentation (1939), because it is awesome.
Brinton discusses various forms of graphic presentation in the 524-page book and what works and what doesn't. There's also some good stuff in there about how to make your graphs, charts, maps, etc (by hand).
The most interesting part is that many of the graphics -- despite having no computers in 1939 -- look a lot like what we have today. Albeit, they're a little rougher because they're made by hand, but that's just added flavor.