The book "Fermat Polygonal Number Theorem" by Betascript Publishing offers a comprehensive analysis of the Fermat polygonal number theorem, which states that every positive integer can be expressed as the sum of at most n n-gonal numbers. This mathematical theory has a long history, dating back to the proofs by Joseph Louis Lagrange and Carl Friedrich Gauss, and was ultimately fully proven by Augustin-Louis Cauchy in 1813. The work contains information primarily sourced from Wikipedia and other free online resources, and is aimed at readers interested in the fundamentals and development of these mathematical concepts. It serves as a valuable reference for students and professionals engaged in number theory and its applications.