The "Handbook of Geostationary Orbits" offers a comprehensive and detailed examination of geostationary orbits, based on developments since the first publication by the European Space Agency (ESA) in 1983. It is aimed at engineers and operators of spacecraft, providing both theoretical foundations and practical advice on the orbit control of geostationary spacecraft. The updated edition includes new mathematical methods and takes into account the latest geophysical and astronomical parameters to reflect the current state of the art. This handbook is not only significant for PEPSOC users but also for anyone involved with the topic of geostationary orbits. It serves as a valuable resource that documents the developments and challenges in this specific area of aerospace engineering.