Sound like interesting idea. I will sign up to see what's the book like. If you are ok with it I can maybe help you spread it around a bit. I have a small (100) following of crypto enthusiasts on twitter which should be interested in this.

How do you plan to distribute your book (pdf, epub, other)?. If I like and it and is newbie friendly i am a member of few book sites (unrelated to crypto currencies) where I can link your book after it is finished.