The Coursebook in Feature Geometry is an undergraduate course introducing students to current phonology through a sustained use of the FeatureGeometry framework. It is written as a coherent, accessible, and well-illustrated introduction to the key ideas of Feature Geometry, focusing on rules of assimilation. In its 20 units and 40 exercises, it takes the reader step-by-step through the representational devices ofFeature Geometry. The Coursebook attempts to present the core ideas of Feature Geometry in a unified way, rather than attempting to incorporate the (considerable) debate concerning almost every aspect of the theory. The version of Feature Geometry underlying the Coursebook is basically that found in Sagey’s The Representation of features in non-linear phonology (1990), revised in accordance with the claims of Lahiri and Evans’ 1991 article on Palatalization and coronality.The author is Senior Lecturer in the Department of Linguistics and SecondLanguage Teaching, Massey University, New Zealand. The author has a PhD in linguistics from the University of California at San Diego.