OMG, memories come back. My father brought a C64C back from Germany in 1991, complete with a German edition of the User’s Guide. The sample programs ring a bell. I distinctly remember a 7yo version of myself typing in code for the balloon sprite one.<p>Sadly, I never had the Programmer’s Reference Guide. I did, though, own „Commodore 64” by Bohdan Frelek, sometimes considered _the_ C64 Polish bible.