What has the author Belidor written?

You're likely thinking of Bernard Forest de Bélidor (1693-1761), a French military engineer and author. He was a prolific writer, but his most famous work is "The Science of Fortification" (1729).

Here's a summary of his notable works:

* "The Science of Fortification" (1729): A comprehensive treatise on the design and construction of fortifications, covering topics like the principles of defense, the construction of bastions and ramparts, and the use of artillery. This work was extremely influential and widely translated.

* "Architecture Hydraulique" (1737-1753): A series of volumes dedicated to hydraulic engineering, covering subjects like water mills, canals, and bridges.

* "Le Bombardier Français" (1738): A work on the use of mortars and artillery in warfare.

* "Le génie militaire" (1750): A study on the overall principles of military engineering and its application in warfare.

Bélidor's works played a significant role in the development of both military and civil engineering during the 18th century.