This book is divided into the following parts. Although there is a lot of duplicate information in certain parts, it's the easiest way to read it and not to mention the easiest way for me to maintain the book.
Part One gives you general information about this book (versions, where to get it, changelog, mailinglists and how to get in touch with me). It also explains a few important aspects you really want and need to read before you start building an LFS system.
Part Two guides you through the installation of the LFS system which will be the foundation for the rest of the system. Whatever you choose to do with your brand new LFS system, it will be built on the foundation that's installed in this part.
Part Three contains various Appendixes.