Would you consider adding a note to the web page linking to the errata spreadsheet and into the spreadsheet that a new chapter - 4 - has been inserted which has incremented all later chapter numbers by one?
(also the mystery of whether errata will be noticed - there's 69 or so currently)
Classy – sarcasm! I’m not sure you appreciate how much work it is to write a book with over 500 pages. I have always clearly stated that the book is work in progress – there are still whole chapters missing, which I’m currently busy writing. The errata will be fixed eventually.
Pausing/backtracking to deal with minor errata is jarring and a bit disruptive. But it *does* inspire the masses! (the many eyeballs theory) :-)