The book covers step by step a full cycle of a real production ready application. It starts with a basic single page application and then adds critical production layers. All of that done while demonstrating a very clear code examples led by strict TDD. The book smooths the bootstrap of a first user application by creating a simple scaffolding while still providing an overview for advance developers. I found it as a must read book for Node.JS developers which want to deploy a production ready applications. The opinionated way the book leads is also its only short-come, by not mentioning any alternative solutions.