"J C Taylor recently edited a collection of original articles on gauge theory, starting with a few pages from Maxwell's 'Treatise'. The collection is well chosen, and is introduced by an instructive commentary. I find it especially useful since it included translations into English of several articles originally in German." C N Yang SUNY, Stony Brook "This is a fascinating and valuable collection, especially the earlier papers, some of which are not now well known. John Taylor's introductory commentary provides a clear and concise explanation of the context and significance of the papers." Tom Kibble Imperial College, London