As this book is the acknowledged "bible" of PRINCE2, it is expected to cover the method and all of the individual components in detail. A word of warning however, make sure that if you are using it for preparation, revision or as a reference book for the Practitioner exam that you buy a stack of "post it" page markers and use them wisely.
The order of description of the components/processes can be quite frustrating if you haven't got a mental (or physical) picture of the overall method to hand, hence the need to index the book yourself otherwise searching for that vital item can take a you more time than you have planned - not nice when the clock is ticking.
That said, this is a great reference manual once you are up and running and need to remember the details of a step or process. As a seasoned (and battle-scarred) senior IT manager with many years of controlling projects under my belt, I will just leave you with the reminder that this is a framework and you don't need to use every component on every project (unless you really want to make even the smallest initiative into a bureaucratic monster).