This new and completely revised second edition represents the fullest bibliography of Trotsky's published and unpublished writings and papers. Since the first edition in 1972 several vital collections of previously unpublished works have come to light, including the Exile Papers at the Houghton Library, Harvard and the archives of Trotsky's elder son Leon Sedov at the Hoover Institution and the International Instiuut voor Sociale Geschiedenis in Amsterdam. In their combined resources were hundreds of hitherto unknown letters and pieces by Trotsky.
Louis Sinclair's fully updated two volume bibliography of primary sources includes all foreign translations in over forty languages, with transcriptions of all foreign language titles. Completely cross referenced, these two volumes also take account of holdings in smaller, but no less valuable collections to provide unique work of reference.