Art Aufderheider's text is a superb guide to the mummy collections of the world, and an excellent reference for any student of the subject, thus well worth purchasing (or persuading someone else too....)
Of particular importance is his attention to the field as a whole, unlike some texts which simply describe the usual suspects (Egypt, South America etc.). Thus there are several enlightening sections on such diverse mummies as the Greenland Inuit, Sicilian religious and Danish bog bodies. Additionally, the book contains detailed descriptions that include the mummification processes commonly used, where they were used, and what they can tell us about society. In addition Prof Aufderheider addresses issues such as the environmental conditions that may effect mummification, as well as a detailed section on the taphonomic changes that can be observed as a result of such treatments.
Overall, it is an excellent guide to the subject, and of use for both the amateur and the academic.