This edited book is written for students, postdocs and established investigators who want to enter the field of single-particle cryo-EM. This is a recently developed method to determine high-resolution structures of biological macromolecules. A major strength is the fact that cryo-EM does not require prior crystallization of protein complexes. Furthermore, it is especially well suited for larger complexes and molecular machines, although it can also be used for macromolecules as small as 4...