This is a free, online wikibook, so the content is continually being updated and refined. According to the authors, "This book deals with heat transfer in the engineering context, particularly for chemical and mechanical engineers. It includes the basic physics and technology which is used for heating and cooling in industry. Of course, the principles may be applied in other fields if appropriate, and engineers may deal with new technology quite unlike traditional ones. It is intended as a beginning text for first or second year engineering degree students."