Elixir in Action is a great way way to learn the core language, and it’s pretty up-to-date with its latest edition. Elixir as a language has been declared feature-complete, so it doesn’t change that much anyway (the major libraries are a different story).

If you wanted a book to walk you through LiveView after that, I can recommend Programming Phoenix LiveView. The book is currently in “beta”, with the final version expected in a month, so it’s very up-to-date. We have a book club at work and just finished it this past week. It does a good job of showing how to make live-updating CRUD pages along with building a pentominoes puzzle game that’s rendered with SVG. You build up the project chapter-to-chapter and have a pretty cool little app at the end.

As long as you don’t need offline support, then a monolith webapp seems like a perfect use for LiveView, especially for a solo dev!