The book "Textbook of Tanning. A Treatise on the Conversion of Leather into Leather, Both Practical and Theoretical Aspects" by Henry Richardson Procter is an essential document for anyone interested in the technical processes of leather processing. In his book, he examines in detail both practical and theoretical aspects of tanning, explaining each stage of the process from the starting materials to the final product - quality leather. The author reveals the techniques, tools and recipes needed to successfully carry out the tanning process, as well as illuminates the theoretical foundations, scaring the reader to delve deeper into the leather industry. This book is an indispensable source of knowledge for leather professionals and anyone interested in the craft of tanning.