I have cloned the repository then combined the chapters using pdftk:
pdftk *.pdf cat output Modern_Cpp_Programming.pdf
on airplane with a phone so can't do that,wish it had a download link for the full PDF,will create when I am back to my pc
Termux?
This worked on the Mac. I had to install pdftk (brew install pdftk-java) first. The result is nicely formatted for reading on an iPad after importing into Books.