This textbook was passed onto me by my previous supervisor.I have always been looking for a thermo book that is exactly like that. Every concept is self-contained, and presented formally (mathematically and verbally) and succinctly. More impotantly, with this book I can teach these concepts myself, and can be referred to *quickly* in the future. It is both a beautiful textbook, and a handy reference book.Historically, the evolution of human understanding on the subject of heat and thermodynamics was best described as "a big mess". This book finally brought (almost) absolute order.Indeed, it is sad to see that this book is not really in print, and is very expensive (new). I am very fortunate to have my hand on it.