From a synchronic point of view, the various accentuation systems found in the Baltic and Slavic languages differ considerably from each other. We find languages with free accent and languages with fixed accent, languages with and without syllabic tones, and languages with and without a distinction between short and long vowels. Yet despite the apparent diversity in the attested Baltic and Slavic languages, the sources from which these languages have developed - the reconstructed languages referred to as Proto-Baltic and Proto-Slavic respectively - seem to have had very similar accentuation systems.The prehistory and development of the Baltic and Slavic accentuation systems is the main topic of this book, which contains sixteen articles on Baltic and Slavic accentology written by some of the world's leading specialists in this field.