What are the definitive resources for understanding WASM?

These books really helped me:

https://rustwasm.github.io/docs/book/

https://rustwasm.github.io/docs/wasm-bindgen/

https://rustwasm.github.io/docs/wasm-pack/

I also enjoy Lin Clark's visual explanations of WebAssembly:

https://hacks.mozilla.org/2017/02/a-cartoon-intro-to-webasse...

"The Art of Webassembly" has been really helpful for me. Most of the other books are really about Rust.