The book "Distance Geometry" is a comprehensive collection of research overviews and scientific papers that address the Distance Geometry Problem (DGP) and its various applications. It is divided into three main parts: Theory, Methods, and Applications. The first part focuses on the theoretical aspects of the DGP, including new problem classes and the investigation of their complexity. It also establishes connections to related topics such as the theory of distance matrices and geometric algebra. The second part discusses the mathematical and computational properties of the developed methods used to solve the problems addressed in the first part. The final part of the book highlights the practical applications of the DGP, particularly in areas such as structure elucidation in NMR and rational drug design. This specialized book is aimed at researchers and students interested in the theoretical and practical aspects of Distance Geometry.