"Time-Resolved Spectroscopy in Complex Liquids" is a specialized book that focuses on the investigation of the properties of liquids. The relevance of this subject spans from fundamental theoretical models of random systems to advanced technical applications. However, interpreting and understanding the properties of liquids poses a challenge in materials science. In the liquid phase, the potential and kinetic energies are characterized by similar values, making it difficult to describe the liquid structure independently of its dynamics. The intermolecular forces and molecular movements are closely interconnected, leading to the unique properties of liquid phases. Particularly in liquids with specific intermolecular interactions, such as anisotropic and/or long-range interactions, the liquid states exhibit dynamic aggregation and structuring phenomena. This book provides a comprehensive overview of the latest spectroscopic techniques developed for the study of complex liquids, highlighting both experimental and theoretical perspectives.