Found the original post that explains the algorithm better: https://news.ycombinator.com/item?id=665250 https://news.ycombinator.com/item?id=665250 It is hard

Found the original post that explains the algorithm better: https://news.ycombinator.com/item?id=665250 https://news.ycombinator.com/item?id=665250 It is hard if the book has an incomplete index or poorly named chapters forcing you to skim around.