Introduction to Radiative Transfer: An Optical Remote Sensing Perspective focuses on the principles and applications of radiative transfer theory in geophysical media, equipping readers with the necessary knowledge to convert observed satellite data into real-world quantities. The mathematical background presented allows understanding of electromagnetic radiation propagation, interaction with various media, and observation by satellites. It provides an introduction to radiative transfer theories and methods with background information, with detailed mathematical principles and equations. It approaches the mathematical theory from a foundational level, building upon knowledge across an introductory section and more advanced modelling section. Introduction to Radiative Transfer: An Optical Remote Sensing Perspective benefits students, academics and early career researchers in Earth and environmental sciences who seek to deepen their understanding in preparation for more quantitative techniques in remote sensing.