I wrote this as the introduction I wish I had to Bazel before starting it. Here, we're going to explore the core foundation of what Bazel is, and how to approach it as a mindset, with plenty of code, and explanatory diagrams.This book is intended to get you up to speed with Bazel as fast as humanly possible. It also starts with the presumption you don't know Bazel yet, and focuses on the essentials: How does Bazel work internally? How do we create and extend Bazel builds?As such, I did my very best over the last few months to compile an introduction that should give you a somewhat stable foundation in no time.