The final volume in the section entitled "Word and Sacrament" of Luther's Works traces the development of Luther's concept of the Lord's Supper from the time of the Marburg Colloquy in 1529 down to 1544, two years before his death.
Buy Luther's Works, Volume 38: Word and Sacrament IV by Martin E. Lehmann from Australia's Online Independent Bookstore, BooksDirect.