This textbook provides a clear, concise and comprehensive review of the physical principles behind the devices used to detect charged particles and gamma rays, and the construction and performance of these many different types of detectors. This second edition has been thoroughly revised and updated to include all the latest developments in detector technology. Detectors for high-energy particles and radiation are used in many areas of science, especially particle physics and nuclear physics experiments, nuclear medicine, cosmic ray measurements, space sciences and geological exploration. This second edition includes several new chapters, covering micro-strip gas chambers, silicon strip detectors and CCDs, scintillating fibres, shower detectors using noble liquid gases, and compensating calorimeters for hadronic showers. This lucid textbook is well illustrated throughout with examples from the many areas in science in which these detectors are used. It provides both a coursebook for students in physics, and a useful introduction for researchers in other fields.