Although the theory and methods of the relatively new field of geometric morphometrics are becoming well developed (for an overview, see [1]), it has not yet been applied as widely as it could be, owing to the lack of easily accessible introductory guides. This primer, by Miriam Zelditch and colleagues, should make the field more accessible because the new methods described here are relatively simple to apply using currently available software. Geometric Morphometrics for Biologists contains chapters that cover most of the basic topics that a potential user needs to know to collect data in an appropriate format and to use standard multivariate methods for the analysis and interpretation of shape variation.