Small Multiples
I have three of Tufte's books (not the latest one yet), an I enjoy them gleatry, but their concepts are not always easy to directly put into practice. I consider these books of greater cultural value than technical value.I have two of Few's books, Show Me the Numbers and Information Dashboard Design. Both are informative, and they present concepts in a practical way that makes them easy to implement. Both authors are equally valuable, but for different reasons.