Modern permanent magnets are important for many industries and technologies. New developments in processing techniques, materials, and methods used to produce different types of modern permanent magnets are very useful for devices and industrial applications. This book presents an overview of available permanent magnets and recent developments in modern magnets. Chapters address such topics as light-matter interaction in 2D magnets, the environmental impact of permanent magnets, and advances in nanocrystalline permanent magnets. This book is a valuable resource for undergraduate and graduate students as well as professionals like engineers, scientists, researchers, technicians, and technology managers.