Ivan Venturi, Kring's old developer, was one of the first Italian video game programmers. He sold his first video game for Commodore 64 in 1987. Later, he co-founded the first Italian video game software-house called SIMULMONDO and became its production manager.
For a few years he continued to develop C64 games (at that time it was hard to find people still able to make things for C64 -- but C64 games still had good sales).
These are the scrapbooks Ivan made while developing those C64 games.

If you are a retro-gamer, you will probably really enjoy them!