As a free resource then https://elmprogramming.com/ https://elmprogramming.com/ does a good job of going beyond the official Elm guide. For far as books are co

As a free resource then https://elmprogramming.com/ https://elmprogramming.com/ does a good job of going beyond the official Elm guide. For far as books are concerned, Elm in Action by Richard Feldman and Programming Elm: Build Safe and Maintainable Front-End Applications by Jeremy Fairbank. Best of luck on your journey!