I'd recommend educative platform for your book (as a course). I wrote my own book about Ruby for beginners https://leanpub.com/rubyisforfun https://leanpub.com

I'd recommend educative platform for your book (as a course). I wrote my own book about Ruby for beginners https://leanpub.com/rubyisforfun https://leanpub.com/rubyisforfun, and converted it to a course, which is quite fun https://www.educative.io/courses/handbook-ruby-developers https://www.educative.io/courses/handbook-ruby-developers Released 1-2 weeks ago, but it looks to me like a promising future - the new format of books that are more interactive. Website allows to run snippets, do interactive assessments, and so on. The reading and learning is much more convenient.