The textbook "Cell Adhesion" provides a comprehensive overview of the advances in research on cell adhesion that have been made over the past 25 years. It highlights the development of specific cell surface receptors and their role in adhesion processes, which were originally studied through biochemical and immunological approaches. With the introduction of new methods in cell and molecular biology, as well as powerful techniques for manipulating gene expression in transgenic and knockout mice, the understanding of the molecular structure and function of cell adhesion receptors has significantly expanded. The book covers the four main families of cell adhesion receptors: cadherins, integrins, the Ig superfamily, and the selectin-based adhesion system. It also discusses the importance of cell adhesion in normal embryonic development and adult physiology, as well as the potential disease causes that may arise from disruptions in cell adhesion.