Hyatt and coauthors incorporate clinical vignettes when explaining different aspects of pulmonary function testing, and conclude the major subject headings with a “pearl” that summarizes the topic just covered. The graphic illustrations are simplified in a way that aids in understanding the more difficult aspects of pulmonary function testing for the not-so-physiologically or mathematically inclined, as in the chapter on resistance and compliance. However, these simplifications can also frustrate the reader who might be better versed in the topic. Where appropriate, the authors include explanations of pertinent measurement techniques. For instance, the chapter covering static lung volumes contains brief explanations of nitrogen washout, inert gas dilution, body plethysmography, and the radiologic methods, with accompanying cartoon graphics, prior to launching into the material on interpretation. The chapter on bronchodilators and bronchial challenge testing was the most thorough effort by the authors, guiding the reader through every aspect of these tests, including indications, procedures, and analysis.