""What Is Catholicism?"" is a comprehensive book written by Edmond Henri Adolphe Scherer in 1900. The book aims to provide a detailed and objective understanding of the Catholic faith, its beliefs, practices, and history. Scherer begins by exploring the origins of Catholicism and its development over the centuries, tracing the evolution of the Church's doctrines and teachings. He then delves into the core beliefs of Catholicism, including the importance...