Fascinating book and not what you might think. I saw it on Book TV I think and was interested because it is not some cheesy How To writers guide, but actually is about CODING: As in computer algorithms and natural language processing.
This book presents the findings of numerous algorithms the authors ran analyzing all aspects of novels: style, character, plot and more. The really amazing and surprising bits were some of the details that made a difference, including the use of “very” (bad) versus “really” (best). Even the use of “the” and “of” can be a definitive difference between bestseller and bust.