This realise on "Heat and Mass Transfer" contains comprehensive treatmen. of the subject matter in simple, lucid and direct language. It envelopes a large number of solved problems, properly graded, including typical examples from examination point of view.The book comprises 13 chapters. All chapters are saturated with much needed text supported by simple and self explanatory figures. A large number of Worked Examples (including Typical Examples selected from various Indian Universities Examinations question papers), Highlights, Objective Type Question, Theoretical Questions and Unsolved Examples have been added to make the book a comprehensive and a complete unit in all respects.The book will prove to be a boon to the students preparing for engineering undergraduate, AMIE, UPSC and other competitive examinations.The author's thanks are due to his wife Ramesh Rajput for extending all cooperation during preparation of the manuscript and proof reading.In the end the author wishes to express his gratitude to Shri Ravindra Kumar Gupta, Director, S.Chand & Company Ltd., New Delhi for taking a lot of pains in bringing out the book with very good presentation in a short span of time.Although every care has been taken to make the book free of errors both in text as well as in solved examples, yet the author shall feel obliged if errors present are brought to his notice. Constructive criticism of the book will be warmly received.