The book is broadly divided into two sections. In the first section, the methods and techniques for ECG recording are discussed. Topics range from commonly used tests such as Holter monitoring and tilt-table testing to less familiar but potentially very useful tools, such as heart rate variability, baroreflex sensitivity, and T-wave alternans. This range of topics will not appeal to all readers. For example, clinical cardiologists would find the chapters on ST-segment analysis during exercise and ambulatory ECG recording very informative, but chapters such as P-wave signal averaging and heart rate turbulence would be of more interest to the electrophysiologist. As such, I found the four chapters on autonomic effects on heart rate variability and baroreflex sensitivity especially enjoyable. However, discussion of body surface mapping was omitted and would have been a useful addition to this section.