The book "Digital Watermarks and Steganography: A Training Manual with Tasks for Practical and Laboratory Works" by Fedoseyev V. A. is a unique resource for anyone interested in modern information security technologies. This manual will be an indispensable assistant for both students and information security professionals who want to deepen their knowledge and skills in steganography and digital watermarks. In today's world, where information is becoming one of the most valuable resources, issues of its protection come to the fore. Fedoseev, an experienced specialist in the field of information technology, invites readers to immerse themselves in the world of steganography - the art of hiding information in other data. In his book, he examines in detail how digital watermarks can serve as an effective tool for copyright protection and data integrity. The textbook not only explains the theoretical foundations of steganography and watermarks, but also offers practical tasks that will help readers to consolidate the knowledge gained. Each chapter contains laboratory work that aims to develop the practical skills needed to work in this field. This makes the book particularly valuable for technical students as well as practitioners seeking to improve their information security skills. The book will be interesting not only for those who study at the faculties of information technology, but also for those who work in areas related to data security, intellectual property rights and digital technologies. It is suitable for both beginners and experienced professionals who want to expand their horizons and learn more about modern methods of information protection. The topics raised in the book are relevant and important in the context of the rapid development of digital technologies. Fedoseyev emphasizes the need to protect data in an era when information leaks can have serious consequences. It addresses not only the technical aspects of steganography, but also the ethical issues surrounding its use. This makes the book not only a textbook, but also a source for thinking about the future of information security. The author's style is clear and accessible, which allows readers to easily assimilate complex concepts. Fedoseev uses many examples and illustrations, which makes the material more clear and understandable. In addition, the book contains references to other well-known works of the author, such as “Basics of digital security” and “Methods of information protection”, which allows the reader to delve into the study of the topic. If you are looking for a tutorial that will help you master steganography and digital watermarks, Digital Watermarks and Steganography will be an excellent choice. This is not just a book, but a whole course that will open up new horizons in the world of information security. Take a chance to learn about modern methods of data protection and become an expert in the field, which is just beginning to gain popularity. Do not miss the opportunity to immerse yourself in the exciting world of technologies that change our understanding of information security.