First it's really awesome that human judgement and the sentiment analysis tools agree with each other so well. Maybe this was common knowledge, but I was always

First it's really awesome that human judgement and the sentiment analysis tools agree with each other so well. Maybe this was common knowledge, but I was always skeptical of it when I saw it used. Second the amount of human hours put into generating all this data must have been insane. That could have a lot of value to researchers if he'd be willing to share it. Third it's really awesome that the average sentiment changes so much throughout books, making these nice visualizations of the plot. Sentiment is just a fairly crude measure. Emotion and tone has many dimensions. I wonder if it would be possible to use similar tools to discover them, and get even more detailed statistics on the emotion and tone changes between and within works.