Wow. That would have been awesome to publish and publicise some years ago. Yes, please contact the author. It would be great if you can encourage him to release this as BSD licensed. If licensed appropriately, maybe this content should be merged into the existing "NetBSD Internals" http://www.netbsd.org/docs/internals/en/index.html Or if they cover a lot of the same information, then maybe just update and continue to make it available as a complementary document. Thanks for pointing this out.