Data Points: Visualization That Means Something

Good solid introduction to the art of data visualization. Lots of nice examples and exploration of the various questions a data designer should ask themselves. It's an introductory book, I felt I knew most of what I was reading already (and I'm no expert). But it's not a hands-on book in any way, it's something you passively read and learn from. So for someone learning visualization this needs to be paired with implementation exercises.