The book "Advances in Hybrid RANS-LES Modelling" offers a comprehensive analysis and discussion of the advances in turbulence modeling, particularly regarding hybrid RANS-LES methods. These methods have gained importance in recent years as they are increasingly used in both academic research and industrial applications. The book highlights the challenges and opportunities associated with modeling turbulent flows and emphasizes the advantages that hybrid approaches offer compared to traditional methods. By combining Detached Eddy Simulation (DES) and other hybrid techniques, higher efficiency and accuracy in flow modeling are achieved, which is of great interest to various industries, including transportation, energy production, and environmental protection. Developments in computer technology have further propelled these advances, leading to a variety of research and development activities. The editors, Shia-Hui Peng and Werner Haase, contribute their expertise to present the latest findings and applications in this dynamic research field.