The study and development of magnetic nanoparticles is an area of research that has grown rapidly over the last few years, and will continue to do so because of their technological importance. Much of the development involves interdisciplinary research, bringing together the expertise of physicists, chemists and material scientists. For these reasons, the time is now ripe to bring together reviews of the physics, chemistry, fabrication and application of magnetic nanoparticles and nanostructures under a single cover. The proposed book will be both a clear and concise introduction to the topic for beginners and a guide to relevant comprehensive physical phenomena and essential technological applications for the experienced researcher.