The book "Aeronomy of the Earth's Atmosphere and Ionosphere" is a comprehensive collection of contributions from leading scientists addressing the most significant research questions in the field of aeronomy of the Earth's atmosphere and ionosphere. It is the result of collaboration within Division II of the International Association of Geomagnetism and Aeronomy. The publication is divided into five main parts, covering various aspects of the dynamics and chemistry of the mesosphere and lower thermosphere, vertical coupling through upward-propagating waves, ionospheric electrodynamics, as well as disturbances and modeling in the ionosphere and thermosphere. This academic book provides a valuable compilation of recent advances in this research area and is aimed at both students and experienced researchers.