BuddyPress.org

Well done on the book. It sounds really cool. There aren’t enough Buddypress themes out there. I am working on a custom parent theme, would like to share it once its done but its nowhere near ready for release.

Why don’t you set up a website and put that address in the book and then link to or keep copies of the theme on your site. That way if sites go offline you won’t end up with dead links in your published work.