This is Node.JS Apocrypha, a collection of code snippets, comments, and utilities that are useful for Node.js development.
All this comes from my personal experience as a new Node.JS core collaborator. If you are aiming to contribute to the Node.js core, you might find this useful.
The book starts with understanding how Node.js bootstraps - from the moment you type node your_script.js until your code actually runs. From there, we explore the internals that make Node.js tick.