The book "Section Modulus" by Betascript Publishing provides a comprehensive introduction to the concept of section modulus in statics and structural mechanics. It covers the fundamental principles that influence the behavior of beams in various construction applications. The book explains how the section modulus is defined as the ratio of the second moment of area of a cross-section to the distance of the outermost compression fiber from the neutral axis. It discusses the differences between symmetrical and asymmetrical cross-sections and explains their effects on the strength of beams. The content is based on high-quality information from Wikipedia articles and is of interest to students as well as professionals in the field of engineering.