I have several that I’ve kept, some in pretty bad shape including one that I used so much I put it in a big 3-ring binder.

- Learn Extended Color Basic (Coco days)

- The Handbook of BASIC Third Edition, David I. Schneider (8088 days)

- PC Interrupts, Kyle Brown (386 days)

I also have a few Turbo Basic books, which seem to be displaced at the moment.