The book “Application of Number Theory in Digital Signal Processing” by McKellan and Raider is a fascinating and in-depth study that opens up new horizons for the reader in the field of digital signal processing (CCS) through the prism of number theory. This work will be a real discovery for both students and professionals seeking to expand their knowledge in the field of mathematics and its practical application in modern technologies. The book focuses on the relationship between abstract concepts of number theory and real problems that arise in the process of signal processing. The authors skillfully demonstrate how mathematical principles can be used to solve complex problems, such as filtering, compression, and signal recovery. They offer the reader not only theoretical foundations, but also practical examples, which makes the material accessible and understandable. Each section of the book is filled with intriguing tasks and illustrations that help to consolidate the knowledge gained. This book will be of particular interest to engineering students, graduate students, and researchers working in the fields of electronics, communications, and data processing. It will also attract the attention of professionals seeking to update their knowledge and skills in the rapidly evolving field of digital technology. If you are interested in topics such as signal processing algorithms, digital filtering or theoretical mathematics, then “Application of number theory in digital signal processing” will be a desktop book for you. The book raises many topical topics, such as the use of numerical sequences to optimize signal processing algorithms, the use of number theory methods to improve the efficiency of encoding and decoding information. The authors focus on how theoretical knowledge can be applied in practice, which makes the material not only cognitive, but also practically useful. This is especially important in the context of the rapid development of technology, where the ability to adapt and apply new knowledge is becoming a key factor for success. McKellan and Raider's writing style is clear and accessible. They skillfully balance between complex mathematical concepts and practical examples, allowing the reader to easily absorb material. Their previous work is also noteworthy: the authors are known for their research in digital signal processing and number theory, and their experience is felt on every page of the book. They not only share their knowledge, but also inspire the reader to further study topics related to mathematics and its application in real life. If you are looking for a book that combines deep theoretical knowledge and practical application, “Applying Number Theory to Digital Signal Processing” will be an excellent choice. It will help you not only expand your horizons, but also deepen your understanding of how mathematics affects modern technology. This work will be an important step towards mastering complex concepts and their application in the real world. Do not miss the opportunity to immerse yourself in the fascinating world of numbers and signals that this book opens before you!