I have started writing a book on Elmish, in line with elm-tutorial and hello-scala. Here is the link. https://hello-elmish.kunjan.in/
I am posting it here. If anyone is interested in any kind of general conversation regarding the book. You can always open an issue on github, but I guess having a forum based conversation is also an good option.
Very much beginner. Even people who only wanted to use Fable and may not be familiar with F#. So, will try not to touch magical features of F# even. It is mostly shown as alternative to Elm. Not as language book, but as concept book or Elm architecture book.