As part of the process of becoming an official GNU package, I've changed the license for the book, "A Brief History of Computing: The GNU Story," from the Creative Commons BY-SA 3.0 to the GNU Free Documentation License.
As a first provisional step in becoming an official GNU package, the GNU Project has graciously agreed to host the project to write, "A Brief History of Computing: The GNU Story," at their Savannah free software forge. It's currently a non-GNU package, but we're working toward making it an official GNU package. I'll keep you apprised as things develop.