Book excerpt: Magnetometry for Archaeologists covers the most widely used method for archaeological surveying. Arnold Aspinall, Chris Gaffney, and Armin Schmidt recount the history of magnetometers from their inception through today's state-of-the-art detectors, explain the physics behind the different types of sensors, and describe the most fruitful ways in which the technology can be employed. They also consider the theoretical and practical uses of magnetometry for many archaeological periods and regions. The reader learns what magnetometry measures, how knowledge gained from it influences the ways in which surveys are undertaken, and the potential problems associated with the use, display, and interpretation of buried remains. Book jacket.