In this comprehensive "Fundamentals of Heat Transfer," readers explore the intriguing world of thermal energy transformation. The book guides readers through heat exchange's difficulties from fundamentals to applications. Our voyage focuses on the complex dance of molecules and energy that transfers heat from high to low temperatures. Readers learn about conduction, convection, and radiation—the three pillars of heat transfer—through clear explanations and illustrations. From heat conduction through solids to fluid convection currents, each idea is explained to reveal its fundamentals. As the voyage proceeds, readers are provided with the tools they need to traverse the landscape of heat transfer analysis and design. Mathematical models elucidate heat conduction routes, while practical insights help optimize heat exchangers and thermal systems. With each page flip, readers get a better grasp of how to analyses, forecast, and manage thermal processes with accuracy and efficiency. However, the exploration does not occur in isolation. Recognizing the multidisciplinary character of heat transfer, the book broadens its scope to include fields such as fluid mechanics, thermodynamics, and materials science. By making links between these disciplines, readers get a comprehensive grasp of how heat transfer interacts with and impacts many domains of engineering and science.