The point of this book isn't to function neither as the tutorial or intro to the language, nor as a language refererence or stdlib API referenece. It's purpose is to collect common tasks and show idiomatic and practical way to do them in Rust. In the process, its purpose is to introduce central libraries in the ecosystem. It sounds that you want it – and maybe the model of developing software in Rust itself? – to be something entirely different than it actually is.