The book outlines the state-of-the-art in physics and chemistry of various nonequilibrium phenomena, including the issues of the kinetics of elementary processes during combustion, in plasma, and in the atmosphere; physics of aerosols, clusters, and nanostructures; ignition and combustion of organic, metallized, and synthetic fuels including processes in jet engines; physics of high-speed reactive flows, shock and detonation waves; as well as new technologies based on nonequilibrium physical and chemical processes. Despite the apparent diversity of topics and disciplines, they are closely interrelated. The published materials were presented and comprehensively discussed at the 11th International Symposium on Nonequilibrium Processes, Plasma, Combustion, and Atmospheric Phenomena. The Symposium was held in Sochi, Russia, from October 7 to 11, 2024. All materials are logically grouped in six Chapters: Kinetics; Plasma, Lasers, and Nanostructures; Ignition and Combustion; Shock Waves and Detonations; Engines; and Technologies. All materials are presented both in English and in Russian.