Naujok started with a bare production hull for a 34 foot sailboat, and finished it to standards equal to any production yacht. Along the way he took great photos showing the details of each step. The illustrations are excellent. A great feature of this book is that it systematically takes you through the entire fitting-out process.
Like all books, this one is limited in how much information it can pack into one volume. Completing a yacht interior usually involves applying the skills of a cabinetmaker, electrician, plumber, upholsterer, etc., and while this book shows you what's involved, you'll need other materials if you're not experienced in each of these areas. Surprisingly, all of the work is done with hand tools and a limited number of portable power tools (and, I guess, a lot of patience...). Stationary woodworking machines such as tablesaw, bandsaw, and sanders would save considerable labor.
My biggest criticism has to do with the translation. The book was originally written in German, and translated in the UK. As such, much of the terminology and product names are unfamiliar in North America. For this reason you'll want to refer to other sources. But, if you're considering building or rebuilding a boat interior, books are going to be your least expense.