I love Alex Edwards. His books and Learn go with tests were my first introduction to the language. Still recommend to this day.

I'm feel inspired to convert some old stuff to HTMX

Seconded on the Alex Edwards adoration. Anyone with the slightest interest in learning Go for web development should pick up both Let's Go and Let's Go Further. They are two of the most approachable, enjoyable and practical introductions to a programming language I've read.