"Symbolical Masonry: An Interpretation of the Three Degrees" by H.L. Haywood is a book that provides an interpretation of the three degrees of Freemasonry. The author explains the symbolic meanings behind the rituals and ceremonies of the craft, providing a deeper understanding of the principles and values of Masonry. The book covers various topics related to Masonic symbolism, including the symbolism of the square and compass, the significance of the Masonic apron, and the meaning of the various Masonic degrees. It also explores the history and origins of the craft, as well as its place in modern society. Overall, "Symbolical Masonry" is a comprehensive guide to the principles and practices of Freemasonry, written with clarity and insight by a knowledgeable Masonic scholar.