I'm the author of the book A Composer's Guide to Game Music and I made a 4-part video series to go with my book. I thought it might interest the folks here at Soundtrack Central.

Here's the first video. It focuses on interactive music composition in a technique known as "Vertical Layering," with examples from one of my projects as a video game composer -- The Maw (Twisted Pixel Games).

http://www.youtube.com/watch?v=plVLJ1OXAiE

Also, if you'd like to see the trailer for my book, A Composer's Guide to Game Music, check out the video below:

http://www.youtube.com/watch?v=0CXHTu8QEDQ