Very well done PDFs, these are not the Maxon manuals for R9 these were custom created by someone... there are 6 PDFs covering C4D operation & 80-90% are applicable to XL6-Up...
BTW - C4D R9 was the last version to feature PDF manuals before they went to that damn built-in help system which sucked quite a bit...
https://archive.org/details/cinema-4-d-4-en