Karl Brugmann (1849–1919) had recently taken up a newly-established chair in comparative philology at Freiburg im Breisgau when he began to publish his monumental, multi-volume comparative grammar of the Indo-European languages. In his foreword he argued that a new overview was needed for scholars and students of this rapidly developing ‘young’ subject (only 70 years old at the time). His book provides a fascinating snapshot of the field, the scholars active in it, and the debates they engaged in. The first volume is devoted to phonology; the second volume, on morphology, had to be divided by the original publisher, and it is bound in three parts in this reissue. There is also a volume containing indexes of words, topics and names. Berthold Delbrück’s three-volume book on Indo-European syntax, which complements Brugmann’s work, is also available in this series.