Any textbook authors out there?

Just wondering if we have any other textbook authors in the group?

My wife and I author college computer textbooks, although we also produce computer software and I've recently published my first non-fiction historical book. We've been writing computer textbooks for some 16 years now--got in on the ground floor with Windows and Excel, moved on to a concepts book and have been writing steadily ever since.

I've been seeing more books that teach programming through game development. I've never tried one, but that's an interesting approach that just might work.

Although we've written tons of computer textbooks, we've never written one on programming. I've thought about it from time to time, but aside from my recent non-fiction WWII book, we keep coming back to computer concepts textbooks and application textbooks.