Researchers and graduate students interested in the Mössbauer Effect and its Application will find this volume of the Hyperfine Interactions Journal indispensable. The volume presents the most recent developments in the methodology of Mössbauer spectroscopy; it covers the progress in the understanding of the more recent fields of nanoparticles, nanowires, multilayers and superlattices, surfaces and interfaces. In addition, the traditional areas of applications in physics, chemistry, biology, medicine, earth science, mineralogy, archaeology, material science, thin films, metallurgy and industrial applications like corrosion and catalysis are well presented. The contributions include theoretical treatments using ab initio calculations, molecular simulations as well as experimental results utilizing techniques like transmission spectroscopy, CEMS and nuclear resonance scattering.