Handbook on the Physics and Chemistry of Rare Earths: Including Actinides, Volume 64, the latest release in this continuous series that covers all aspects of rare earth science, including chemistry, life sciences, materials science and physics, presents interesting chapters on a variety of topics, with this release including sections on Structure and properties of Ln2M3Ge5 compounds, Giant magnetocaloric effect materials, Lanthanide-based single-molecule magnets, and Magnetic Refrigeration with Lanthanide-Based Materials.