I read the whole thing and enjoyed it. I do feel that I can't give your "Lean Canvas" an honest appreciation unless I sit down and actually do one for my startup, but that's something I'd like to do after reading your book.
Is the book a lead-in for using your software? It wasn't clear to me after reading it that Lean Canvas was part of a web application that presumably costs $49/month. I think that should probably be at the beginning. Obviously, you can use the methodology without the web application, but maybe tie it in earlier somehow?
One suggestion for page 94 - from an SEO perspective, I'd suggest that you blog at http://www.yourcompany.com/blog instead of http://blog.yourcompany.com/ because the link juice doesn't transfer across domain names.