This book is another creative attempt by the Rust community to teach the Rust programming language. Steve Klabnik - co-author of The Rust Programming Language book - created a book which teaches the same core concepts of programming in Rust but through code examples.
These code examples are all playable and/or editable embedded code snippets which use Rust Playground, allowing you to run and modify the code you're studying. There are often a couple of paragraphs surrounding the code examples, but - since the emphasis is on learning through code examples - they are not the primary instruction medium.
This book is surprisingly effective and great to link to your notes for those times when you want to look some up Rust concept and interact with it directly.
An excellent and comprehensive ebook with executable examples. Suggest using this alongside additional small exercises like rustlings (https://github.com/rust-lang/rustlings), advent of code or your own project.