This textbook presents the classical topics of conduction heat transfer and extends the coverage to include chapters on perturbation methods, heat transfer in living tissue, numerical solutions using MATLAB®, and microscale conduction. This makes the book unique among the many published textbooks on conduction heat transfer. Other noteworthy features of the book are: The material is organized to provide students with the tools to model, analyze, and solve a wide range of engineering applications involving conduction heat transfer. Mathematical techniques and numerical solvers are explained in a clear and simplified fashion to be used as instruments in obtaining solutions. The simplicity of one-dimensional conduction is used to drill students in the role of boundary conditions and to explore a variety of physical conditions that are of practical interest. Examples are carefully selected to illustrate the application of principles andconstruction of solutions. Students are trained to follow a systematic problem-solving methodology with emphasis on thought process, logic, reasoning, and verification. Solutions to all examples and end-of-chapter problems follow an orderly problem-solving approach.