The book "Radiative Decay Engineering" provides a comprehensive introduction to the principles and applications of radiative decay engineering (RDE). In recent years, interest in RDE has significantly increased across various scientific disciplines, particularly in biotechnology, clinical analytics, and chemical analysis. The authors, Chris D. Geddes and Joseph R. Lakowicz, present in this textbook the fundamental concepts and theories necessary for understanding and applying RDE. Despite the relative simplicity of implementation, grasping the underlying principles is often challenging, as these concepts are scattered throughout the literature in optics and chemical physics. The book is aimed at biophysical scientists and offers valuable insights into the interactions between metallic particles and fluorophores, which are crucial for the development of new technologies in the biological sciences and nanotechnology.