This book, Masonry in its three degrees of the York Rite, is a complete and systematic study of the structure, symbology, philosophy and functioning of the York Rite in its symbolic degrees: Apprentice, Fellow and Master Mason. It analyzes in detail the initiatory development of the Mason, from his entrance to his exaltation, addressing the rituals, symbols and values that guide his spiritual and moral formation.The book also describes the composition of the lodge, its officers, the functions of each, and the requirements necessary to open a lodge in each degree. In addition, ritual procedures, philosophical symbolism, and the importance of the lodge as a microcosm of perfection are explored. The book culminates with a discussion of the current challenges of the York Rite, its relevance in the 21st century, and a compilation of traditional catechisms, prayers, and plates used in Masonic work.Aimed at Masons, researchers and scholars of the initiatory traditions, this work seeks to consolidate the practical and theoretical knowledge of the York Rite, from a respectful, academic and deeply symbolic perspective.