Edward Tufte is a great source for learning which types of charts and visual techniques do their job best. I enjoyed his book "The Visual Display of Quantitati

Edward Tufte is a great source for learning which types of charts and visual techniques do their job best. I enjoyed his book "The Visual Display of Quantitative Information." Here's a discussion thread about pie charts on his website (Tufte chimes in a few times): https://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=00018S https://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=...