The book "Luther's Small Catechism Explained Created in the Form of Questions and Answers" by Harald Ulrik Sverdrup is a valuable source for understanding the basics of the Christian faith according to the principles of Protestantism. In this work, the author tries to explain and illustrate in detail the content of Martin Luther's Small Catechism through a system of questions and answers. The book allows the reader to better understand the main principles of Protestant doctrine, and also reveals the role of the catechism in the formation of the personal faith of each Christian. Thanks to the clear and concise style of the author, the book will be a useful addition to the library of those who seek to deepen their spiritual understanding.