I'm woking on converting the student text for the Basic Course into an epub book. Right now I'm just typing it in a google doc. It's viewable at the link below. The work will remain in the public domain and the epub will be hosted on github when ready. If you are interested in helping with the effort let me know at [Pipe Man Music at g mail dot com].
https://docs.google.com/document/edit?i ... VXcA&hl=en