This book is addressed to undergraduate students of university institutions worldwide, with the ultimate goal of presenting solved problems of heat transfer faced by the modern engineer daily. The content is divided into 5 main chapters that include the three main modes of heat transfer: conduction, convection and radiation, including additional aspects such as the heat exchangers and the basic principles of mass transfer. We believe that this novel book will cover these topics analytically, providing the necessary background for the future heat transfer engineers. The authors are free to receive comments of improvements at a future edition.