Learning is a process that never ends. You may be a charting expert, but there’s always more to learn. Two of the best ways you can stay up to date is by reading books and participating in forums. Let’s first look at books. Most charting books fall into two categories – about charting design and charting techniques. Books within the first category look at charting, so as to how a particular chart will help people understand a difficult concept. They also look at design principles and best practices.