There are more books about the Commodore C16 and Plus/4 available for download. The latest additions are: Commodore Plus/4 User's Manual. Commodore Plus/4 Integrated Software Manual. Write your own adventure programs. GEOS Inside and Out. The Commodore 16 Games Book. Beginners Micro Guides - Commodore 16. An Introduction to Basic - Part 1. C16/Plus 4 Reference Book.