By 1938 virtually all of "Finnegans Wake" was in print in the "transition" serialisation and in the booklets, with the exception of Part IV. Joyce continued to revise all previously published sections until "Finnegans Wake"'s final published form, resulting in the text existing in a number of different forms, to the point that critics can speak of "Finnegans Wake" being a different entity to "Work in Progress". The book was finally published simultaneously by Faber and Faber in London and by Viking Press in New York on 4 May 1939, after seventeen years of composition.