The book “Investigation of the capillary-porous structure of paper and cardboard” by Mikhail Ageev is a deep and fascinating immersion in the world of materials science, which will be interesting not only to specialists, but also to those who just want to better understand how things familiar to us are arranged. This work, based on many years of research and experiments, reveals the secrets of the capillary-porous structure of paper and cardboard, exploring their physical and chemical properties, as well as the impact of these characteristics on practical applications in various industries. The book will be especially useful for students and graduate students studying materials and technology, as well as engineers and technologists working in the field of paper production and packaging. It may also be of interest to researchers dealing with the environmental aspects of paper and cardboard products processing, as well as to anyone who wants to expand their knowledge of the properties of materials used in everyday life. Ageev's work raises important topics, such as paper's interaction with the environment, the effect of moisture on its structure and strength, and ways to improve the properties of materials to increase their stability and durability. These aspects are particularly relevant in light of current environmental challenges, as recycling and reuse of materials become increasingly important. The book not only provides a theoretical framework, but also includes practical recommendations, which makes it an indispensable tool for those who seek to innovate in production processes. The author's style is distinguished by clarity and accessibility, which allows even complex scientific concepts to be presented in an understandable form. Mikhail Ageev is also known for his other works in the field of materials science, which have gained recognition both in Russia and abroad. His ability to combine a scientific approach with practical aspects makes his books a valuable resource for a wide audience. Readers interested in the topics of ecology, sustainable development and new technologies in production will find in this book a lot of useful and inspiring. It will also be a great addition for libraries of technical students, as well as for anyone who wants to deepen their knowledge of the materials that surround us every day. The topics discussed in the book are relevant for both packaging manufacturers and designers working with paper and cardboard. Understanding the capillary-porous structure can help in creating more efficient and environmentally friendly packaging solutions, making this work important for a sustainable business. Thus, the “Study of the capillary-porous structure of paper and cardboard” is not just a scientific work, but a real find for anyone who wants to understand how to improve the quality of life through the study and application of materials. This book will not only be a useful source of information, but also an inspiration for new ideas and projects in the field of materials science.