Summary: The book "Readings in Business Cycles" is the second collection of reprinted articles focusing on business cycles, reflecting the growing emphasis on mathematical formulation and econometric treatment. It excludes articles already reprinted elsewhere and avoids covering economic growth, but explores analytical tools and empirical research to establish economic models. It critically evaluates cycles in the economy and studies fluctuations in cyclical behavior over time, offering a variety of articles covering dynamic models, estimation techniques, and empirical studies. The text includes references to notable contributions in the field by researchers like A.W. Phillips and acknowledgment of significant questions related to tax changes and government expenditures. The book exhibits an empirical standpoint, emphasizing a fusion of theoretical preconceptions with large-scale observation and measurement to understand complex cyclical fluctuations. It also highlights limitations and the need for more realistic models in economic dynamics research. Substantial statistical data analysis and theoretical argumentation characterize the book's presentation, focusing on balancing empirical observations with theoretical constructs to enhance the understanding of economic fluctuations and improve economic theory.