This book provides a clear and elegant account of the development of Spanish over the last 2000 years. Although principally oriented towards 'internal' history, 'external' history is considered in outline in the Introduction and is referred to throughout. The four principal chapters deal in detail with phonological development, and with morpho-syntactical, lexical and semantic change. Professor Penny's treatment of the sound-system is in terms both of broad patterns of change and specific phonemic developments, and is described in two main phases: spoken Latin to medieval Spanish, and medieval to modern Spanish. In the chapter on morpho-syntax, grammatical morphology and lexical morphology are treated separately, with particular attention paid to word formation. The sources of Spanish vocabulary, inherited and borrowed, are discussed in Chapter 4, and Chapter 5 is concerned with causes, typology and effects of semantic change. Written as a textbook, the comprehensive coverage of the major varieties of Spanish given here will be welcomed by scholars and students alike.