This book provides an updated view of our knowledge about Phrygian, an Indo-European language attested to have been spoken in Anatolia between the 8th century BC and the Roman Imperial period. Although a linguistic and epigraphic approach is the core of the book, it covers all major topics of research on Phrygian: the historical and archaeological contexts in which the Phrygian texts were found, a comprehensive grammar with diachronic and comparative remarks, an overview of the linguistic contacts attested for Phrygian, a discussion about its position within the Indo-European language family, a complete lexicon and index of the Phrygian inscriptions, a study of the Phrygian glosses and a complete, critical catalogue of the Phrygian inscriptions with new readings and interpretations.