The title of the book is The two rules of the practical perspective. Probably there is in the book theory about how we as humans see the things in the world and on what base of rules we can draw a 3-dimensional object into a piece of paper that is 2 dimensional.
The book is divided into 2 main chapters. Then there are subordinated chapters that explain in detail what these rules are. The second rule seems to be more complicated than the first because it has way more chapters than the first rule.
The book has a lot of illustrations and the majority of them are geometrical elements that serve as explanations of what the text talks about. In some illustrations it is explained what techniques make it possible to draw 3 dimensional as for example you take a cord and then place it on the 3-dimensional object and on the other end of the cord you have a paper and the cord marks the position on the paper so you can draw step by step a 3-dimensional object knowing the exact position where to draw (p. 56).
The format of the book is in a4 so it is meant as a study book and not like a book to carry everywhere and read in the tram. The thickness of the book is around 1.5 centimeters thick so that means that the topic of the book is more specific and not like a lexicon that has thousands of things to list and therefore it is 5 to 10 centimeters thick.
The author of the book is Ignatio Danti and with this book, he wanted to share the knowledge of how to draw properly 3d objects onto a sheet. He was into mathematics, astronomy, and geography.