The book "The Development of Armor-Piercing Projectiles (with Suggestions for Their Improvement)" by author Carlos de Zafra is an important source of information for those interested in military culture. The book examines in detail the stages of development of armor-piercing projectiles in view of their design and effectiveness in combat conditions. The author offers constructive recommendations for improving these shells, which makes this book not only a supplement to military literature, but also a practical guide for specialists in the field of armed forces. The book "Development of armor-piercing projectiles (with proposals for their improvement)" is a valuable resource for both military specialists and anyone interested in the history of the development of military equipment.