Abaza, a little-documented Northwest Caucasian language, exhibits an extensive agreement system. This book, the result of field work carried out by Brian O'Herin, is both descriptive and analytical. As a descriptive work, it provides thorough coverage of a significant subsystem of Abaza grammar---the agreement system. Abaza exhibits morphological agreement between a noun and its possessor, between a postposition and its object, and between a verb and virtually all verbal arguments, resulting in multiple agreement relationships. As an analytical work, Case and Agreement in Abaza provides a unified analysis of the agreement system within the theory of Principles and Parameters, demonstrating how a variety of structures (causative, applicative, inverted, etc.) can be accounted for within a single simple analysis. O'Herin's work is valuable for those interested in descriptions of languages of the Caucasus, as well as for syntacticians, particularly those interested in agreement systems and ergativity. Brian O'Herin received his Ph.D. in Linguistics in 1995. He has been a member of SIL since 1984. He did field research on Abaza for more than ten years and is currently assistant director of the Asia SIL school in Darwin, Australia.