By the way, how are you cataloging this? It appears that you put in a lot of work by manually adding variations by hand.
The entire SGF file for the AlphaGo Teach book is available here:
https://alphagoteach.deepmind.com/dist/files/book.sgf
According to a comment in their root node:
# nodes = 371187
# variations = 20991
# duplicates = 422
max path length = 70
# human nodes = 8802
# missing value = 0
# missing ag moves = 0
# mirror go positions = 221