In the second chapter of my book: Dell’architettura. Dialogi di Ermenegildo Pini C.R.B. the author also wrote about fortifications. Even though there might be less illustrations in my book, the authors of our books approached the topic of the fortification in a mathematical way with lots of formulas. The book: “Architectura militaris” by Andreas Cellarius (1645) is over 100 years older, but since both of the authors were scientists and mathematicians, they found a common language in math. This is important, since my book was written and published in Italy, and yours was written by a German author.
The structure and the topics of your book remind me quite a lot of my book. Dell’architettura. Dialogi di Ermenegildo Pini C.R.B. also had drawings and illustrations attached in the appendix, but no illustrations in the rest of the book. Within the text the author of my book also uses tables and formulas to explain the topic of domes and fortification and its precise geometry. This shows, that even though these books are over 100 years apart, that mathematics still is the language of choice, when it comes to explaining complex topics in architecture or architectural theory.