Thanks for the feedback! I should clarify that the first introductory lessons are much shorter than the later ones.
"Programming Phoenix" is a great book, no doubt about that! This Ludu course is structured in a slightly different way though. It doesn't assume that you already know about Elixir, Mix and functional programming, and it also doesn't go through every feature of Phoenix. Instead, it focuses more on how to tackle real problems when building an application from scratch, and how the frontend and backend work together.
That being said, I've now set it to $29.99 instead of $39.99 as a special launch price!
If you're willing to prepare a similar course for free, then I think you should. I'm sure people would appreciate it!