""An Introduction to the Theory of Groups of Finite Order"" is a comprehensive textbook written by Harold Hilton, which provides an in-depth understanding of the theory of groups of finite order. The book is designed to introduce the reader to the fundamental concepts and principles of group theory, which is an essential branch of abstract algebra. The book covers a wide range of topics, including group structure, subgroups, homomorphisms, isomorphisms, and group actions. It also discusses important theorems, such as Lagrange's theorem, Sylow's theorem, and the classification of finite simple groups. The book is aimed at undergraduate and graduate students in mathematics, but it can also be used as a reference for researchers and professionals in the field. The book is well-organized and written in a clear and concise style, with numerous examples and exercises to help the reader understand the material. Overall, ""An Introduction to the Theory of Groups of Finite Order"" is an excellent resource for anyone interested in learning about group theory and its applications.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.