Radio Shack TRS80 Level II Basic Reference Manual Second edition
Circa 1979
This is the more advanced manual assuming that you know something about Basic. Lots of information and programs to type in.
The condition is not good, it looks like it was taken from a wire bound folder and put into a ring binder, it has had a life over the last 47 years!
It does however seem complete and all the pages are there, including the original 90 day warranty.
May be of interest.
UK seller, free 48hr tracked postage.