How you should read the book?
If you are not very familiar with concurrency in C++, start at the very beginning with A Quick Overview to get the big picture.
Once you get the big picture, you can proceed with the The Details. Skip the memory model in your first iteration of the book, unless you are entirely sure that is what you are looking for. The chapter Case Studies should help you apply the theory, something that is sometimes quite challenging as it requires a basic understanding of the memory model.
The chapters about The Near Future: C++20 and the The Future: C++23 are optional. I am very curious about the future. I hope you are too!
The last part, Further Information provides you with additional guidance towards a better understanding of my book and getting the most out of it.