The book "Molecular Processes in Plasmas" by Yukikazu Itikawa offers a comprehensive examination of the role of molecules in various plasmas, extending beyond traditional ion and atom levels. It covers a wide range of applications, including the ionospheres of Earth and other planets, stellar atmospheres, as well as gaseous discharges used in various devices and processes. The author presents a detailed analysis of the elementary collision processes that occur between molecules and electrons or ions. Each of these processes is described concisely and informatively based on current knowledge in atomic and molecular physics. Special attention is given to aspects that are often overlooked by professionals in the field, making the book a valuable resource for students and experts in plasma physics.