The book “Macrocyclic effect and structural chemistry of porphyrins” is a unique publication, which is the result of joint work of a group of authors, each of whom is an expert in his field. This work immerses the reader in the fascinating world of macrocyclic compounds, in particular porphyrins, and reveals their amazing properties and potential applications. Porphyrins are complex organic molecules that play a key role in biochemical processes such as photosynthesis and respiration. The book examines not only the basic aspects of their chemical structure, but also the mechanisms that underlie their unique properties. The authors describe in detail the macrocyclic effect, which is an important factor in porphyrin chemistry, and how this effect affects their interaction with other molecules. The reader will be able to learn about how porphyrins can be used in medicine, for example, in photodynamic therapy, as well as in the development of new materials and technologies. This book will be of interest not only to professional chemists and researchers, but also to students studying chemistry, biochemistry or materials. It will be a valuable source of information for those who want to deepen their knowledge in structural chemistry and macrocyclic compounds. Due to the accessible style of presentation and clear logic, the book is suitable for both experienced specialists and beginners who want to get acquainted with this fascinating topic. The topics raised in the book go beyond pure chemistry. The authors discuss the environmental aspects of the use of porphyrins, their role in sustainable development and possible ways of application in new technologies. This makes the book relevant and important for a wide range of readers interested in modern scientific achievements and their impact on the environment. The style of the authors is distinguished by depth of analysis and attention to detail. They use a rich scientific language, but at the same time try to make the material available to a wide audience. This allows readers not only to gain new knowledge, but also to enjoy the learning process. The book includes many illustrations, graphs and diagrams, which helps to better understand complex concepts and makes reading more fascinating. “Macrocyclic effect and structural chemistry of porphyrins” can become not only a textbook, but also a reference book for researchers and practitioners working in the field of chemistry, biochemistry and materials science. If you are interested in topics such as molecular structure, molecular interactions, and their applications in science and technology, this book should definitely be in your library. In conclusion, this edition is not just a book about chemistry, but a real find for anyone who wants to understand how macrocyclic compounds can change our understanding of the world. It inspires new discoveries and exploration, opening doors to the exciting world of porphyrins and their endless possibilities. Do not miss the chance to immerse yourself in this fascinating topic and expand your horizons!