The full title of the Book reads as „Livre d’architecture“ with the detailed subtitles „Contenant les principes generaux de cet art.“ „Et les plans, elevations et profils de quelques-uns des batiments faits en France et dans les Pays Etrangers“. Especially the subtitles give an already quite detailed overview over the content of the book, which might also explain why there is no list of contents further in the book, since all the information has been given in the titles. So by only reading the title we know that roughly the contents of the book are the principles of architecture as an artform, and a few examples in the form of floor plans, elevations and profiles (sections?) of buildings mainly located in France. The title is also translated into latin in the book, which adds to the importance of the book, making is appear more accessible and timeless.
When looking through the book, the first thing I noticed is the vast amount of nicely made illustrations there are! There are really more illustations than there is text, which makes the book look more like a collection of buildings, all built by order of Boffrand (the author and architect) himself. It so appears that he wanted to show his buildings off. But not just to anyone: when reading the first pages one comes across the introdruction which is more a dedication to the King. Boffrand mentions, that he hopes the drawings, or the buildings behind them, attract the Kings attention. This intention to show-off is also reflected in the appearance of the book, it is very big and heavy, and like the buildings it presents, it impresses the beholder.