I'm a social user of Zoom, like so many, keeping up with friends, family, and organizations I'm involved with during the pandemic. I don't need to do anything fancy, but I did want to learn to navigate my way around Zoom as a guest and an initiator of a small meeting. It was very helpful for that, but the book is so well organized and so clearly presented that it is useful at whatever level you are trying to master.
Each topic is addressed at the basic (free) user level, the subscriber level, and the corporate level. You can skip over the parts you don't need or have already mastered. Each level in each section gives you a succinct summary of what you can do, and how to do it. So I was able to quickly find and read what I needed, and skip over the rest. If I ever need to learn more, I can tackle another level.
Very useful and helpful