This is the first full scale attempt to record the diachronic development of this important English language variety and includes extensive essays by some of the foremost international scholars of the Scots language. The book attempts to provide a detailed and technical description of the syntax, phonology, morphology and vocabulary of the language in two main periods: the beginnings to 1700 and from 1700 to the present day. The language's geographical variation both in the past and at the present time are fully documented and the sociolinguistic forces which lie behind linguistic innovation and its transmission provide a principal theme running through the book. WINNER of the Saltire society/National Library of Scotland Scottish Research Book of the Year Award