This is great. I regret getting rid of my old computers and manuals. The ZX Spectrum+ manual was indeed a joy, the C64 manual less so, and the Amiga manuals were a bit boring (though a friend kindly gave me some replacements for the latter a couple of years back). Anyway, I learned to program, in BASIC of course, from the ZX Spectrum+ manual, so I'll always have a soft spot in my heart for it. It's still genuinely better than most modern technical documentation and, though it covers all the bases quite thoroughly (excluding assembly and machine code), it's not even a very long read.