See also... the largest previous threads:

2017: https://news.ycombinator.com/item?id=14475489

2014: https://news.ycombinator.com/item?id=7646985

2014 ('now finished'): https://news.ycombinator.com/item?id=7634734

2013: https://news.ycombinator.com/item?id=6004885

About specific chapters:

2018: https://news.ycombinator.com/item?id=17845334

2014: https://news.ycombinator.com/item?id=7543158

2014: https://news.ycombinator.com/item?id=7466711

The first thread was https://news.ycombinator.com/item?id=874080 from 2009, and the discussion is about how incomplete everything is. That's interesting, because how many items with a discussion like that ever actually do get completed?

If I missed any interesting discussions let me know and I'll add to the list.