The textbook "Geometry" by Serge Lang offers a comprehensive and modern approach to geometry that is relevant for both students and educators. It combines the expertise of a renowned mathematician with the practical experiences of a teacher to develop a challenging and engaging curriculum. The book goes beyond traditional Euclidean concepts and addresses a variety of topics that highlight the connection between geometry and other mathematical disciplines. The clear and precise presentation of the content is complemented by a range of exercises that include both routine and more challenging tasks. The twelve chapters of the book cover a wide spectrum of geometric concepts, from fundamentals like distance and angles to more complex topics such as vectors and transformations. This structure makes the book a valuable teaching resource for modern mathematics education.