This text is meant to fill a long felt need for a comprehensive and authoritative book on heat and mass transfer for students of Mechanical/Chemical/Aeronautical/Production/Metallurgical engineering. The dual objective of understanding the physical phenomena involved and the ability to formulate and solve typical problems by an average student has been kept in mind while writing this book. In this text, an effort has been made to identify the similarities in both qualitative and quantitative approach, between heat transfer and mass transfer. This would help in better understanding of the phenomena of mass transfer which is generally thought to be a bit difficult to read. The subject matter has been developed from scratch to a sufficiently advanced stage in a logical and coherent manner with neat illustrations along with an adequate number of solved examples. A fairly large number of problems (with answers) at the end of each chapter will be exciting for both the teacher and the taught to have brain storming discussion in the class. The book has been appended with a set of selected MCQs along with its key. The role of experimentation in the teaching of heat and mass transfer is well established. Properly designed experiments reinforce the teaching of basic principles more thoroughly. Keeping this in mind, one full chapter comprising 12 typical experiments forms another special feature of this text. This edition is for sale in India, Bangladesh, Bhutan, Maldives, Nepal, Myanmar, Pakistan and Sri Lanka only.