H
H. S. M. Coxeter
Harold Scott MacDonald "Donald" Coxeter, CC, FRS, FRSC was a British and later also Canadian geometer. He is regarded as one of the greatest geometers of the 20th century. --Wikipedia
Introduction to geometry
This book offers a comprehensive introduction to the fundamental concepts of geometry. It explores various geometric principles and their applications, providing a solid foundation for students and enthusiasts of mathematics. The text delves into the intricacies of shapes, spaces, and dimensions, making complex ideas accessible.