The present volume is a significant and up-to-date contribution to the debate on the relation between phonetics and phonology, provided by researchers from different countries and representing diversified theoretical positions. The authors of the papers included in this collection analyze selected phenomena situated on the border between phonetics and phonology in various languages, such as English, Italian, Welsh, Polish, German, Southern Saami, Saraiki, and many others, in order to shed more light on the nature of the sound structure of human languages. It is the juxtaposition of different theoretical approaches, including Optimality Theory, Government Phonology, and Laboratory Phonology, coupled with their application to the analysis of specific language data, that makes this book particularly valuable and different from other current publications.