I am excited to announce that the TCEC 21 superfinal book has been made in cooperation between chess Grandmaster Matthew Sadler and myself (Jeroen Noomen). Matthew is a well respected Grandmaster and the co-author of the great book "Game Changer", together with WGM Natasha Regan. It was an honour to get Matthew on board and I am very pleased with the result!
Here is the most important information about our joint effort:
Move length distribution
See also: https://www.chessdom.com/jeroen-noomen-and-gm-matthew-sadler-announce-tcec-s21-superfinal-book-cooperation/