The book is well-written, you can tell the author enjoys the tech behind its subject matters. That was my delight - the enthusiasm of how he explains things. The only drawback its the very high-level everything is touched upon. But, I guess its set that way to whet one's appetite to go research further. Although, I'd read detailed low-level books this author could write on Web technologies. Separate books across TypeScript, React, Node.js, Webpack, Python, Django and Docker. Among other stacks.