Who wrote a book on genealogy in the renaissance?

There wasn't a single, definitive book on genealogy written during the Renaissance. However, the Renaissance period saw a renewed interest in history and lineage, which led to several important works on the subject:

* Francesco Guazzo (1528-1591): His "Historia delle cose del Regno di Napoli" (History of the Things of the Kingdom of Naples) included genealogical information, particularly focusing on the rulers of Naples.

* Claude de Seyssel (1450-1520): His "Grand Chronique" provided extensive genealogical charts for the rulers of France.

* Paolo Giovio (1483-1552): A historian and biographer, Giovio wrote extensively about the lives and lineages of prominent figures, contributing to the study of genealogy.

Important Note: While there were many works dealing with genealogy during the Renaissance, they weren't necessarily organized as standalone "genealogy books" in the modern sense. Instead, they were often incorporated into historical accounts, biographies, or chronicles. The Renaissance saw the beginning of a shift toward a more systematic approach to genealogy, which would be further developed in later centuries.