For scientists, engineers, and manufacturers involved in developing, designing, and applying biomedical sensors, Harsßnyi (electronics technology, Budapest U. of Technology and Economics) surveys sensors that have existing and potential applications in biomedicine. Focusing on sensors themselves rather than on instruments or measurement, he considers what they are, how they work, and why they are or can be used. He suggests that readers might have an easier time with a bit of background in solid state materials, devices and technologies; analytical chemistry; and biochemistry, but promises that none of them is necessary. Annotation c. Book News, Inc., Portland, OR (booknews.com)