The book build works correctly when building locally with scripts/local-build.sh using Texlive 2023, Ubuntu 24.04.1 LTS
The problem is the auto build and deploy GitHub action does not build correctly.
The incorrect build for the split book is at https://book.ledgersmb.org/dev/split-book/sec-customization-workflow-configuration.html
And for the full book at https://book.ledgersmb.org/dev/full-book/#Ch45.S2

