The book provides a comprehensive empirical examination of linguistic convergence in the Balkans. By mapping over 100 linguistic and sociolinguistic features across 60 languages and dialects, the contributions rigorously test the concept of a linguistic area. Each feature is visually represented with maps and analyzed in summaries co-authored by an international team of experts. Conceptualized as a companion to the Atlas of the Balkan Linguistic Area Online (ABLA), the book is an essential resource for scholars of language contact and typology.