The book "Amorphous and Nanocrystalline Materials" provides a comprehensive analysis of the unique properties and behaviors of amorphous and nanocrystalline materials. These materials differ significantly from their crystalline counterparts and open up new possibilities in materials science. The authors, A. Inoue and K. Hashimoto, present systematic insights into the physical properties, structure, and design of these materials, which are important for specific advanced applications. This work is aimed at researchers, engineers, and advanced students who are engaged with the latest developments in materials science. With 206 pages, the book offers a solid foundation for understanding and applying these innovative materials.