The textbook "Multiparameter Equations of State" offers a comprehensive analysis and overview of the theoretical foundations of multiparameter equations of state, which are of great importance in thermodynamics. These formulations have been a crucial source of precise thermodynamic property data for over 30 years and have established themselves as an indispensable tool in scientific and engineering practice. Given the increasing demands for accuracy in thermodynamic data in computer-based calculations and the availability of suitable software tools, the relevance of this topic is growing. The book is aimed at scientists, engineers, and students who wish to engage with empirical multiparameter equations of state. It not only highlights the application of these models but also their development and the associated theoretical aspects, which are often overlooked in many engineering and natural science curricula.