Can you release a printed manual for 10.5? My most recent Cubase 4 book is a bit outdated.
PDF is only good for a quick ctrl-f search, not for reading from a to z.
Go to your Local printshop, get the pdf-file printed, e.g. double sided and in colour, and get it binded.
I think that ship sailed away forever many years ago.
I prefer a real book, with a real cover. Besides that, the look alone of a Cubase book on the shelf!
It’s worth a shot to ask, it might sail back now and then.
Maybe one every 2.5 editions, so once per 5 years. Lots of new features in the meantime.