Atari Turbo basic XL

In 1987 I published a manuel in the Dutch language for the programming Atari Turbo Basic XL 1.5.
The source code of the programming language was written in 1985 by Frank Ostrowski. Since there was no manuel for this programming language, I plucked up courage and written a manual and published.
In 1991, this translated into the German language. And now - in 2015 - ABBUC has a second edition published which I received a copy.
Doing quite something to you if after almost 30 years something you've created is still alive and popular.