What is nuclear medicine? This book characterizes the dilemma in defining a discipline. Although well written, the work is a poorly balanced compilation of wet-tests and other peripherally related topics. Specific areas are excellent. Dr. Raeside is to be complimented for his section on classical physics, which is an excellent overview of a very broad topic. The same holds true for the section on modern physics, although it is surprising to see a current text on nuclear medicine with only limited mention of isotope generators. There is a concise summary of radionuclide instrumentation, but it is superficial relative to a marked emphasis (some 60 pages) on dose calculations. Similarly, the counting statistics are dealt with nicely, but the appendix is far too complicated for a textbook of this nature. This depth of information will be useful only to full-time practitioners of nuclear medicine, and the rest of the book is