Written specifically for this volume were forewords by Renata Scotto as well as the composer's daughter, Tarquinia Jolanda Zandonai. A second biography, "Leoncavallo: Life and Works", with a foreword by Plácido Domingo and Piera Leoncavallo, appeared in 2007. An earlier edition, sponsored by Baroness Hildegarde von Münchhausen, who had purchased a large amount of the composer's estate, preceded this in 2007. Following the publication, Dryden took part in a series of interviews recorded for German radio (NDR) and the Bayerische Kammeroper. His most recent biography, "Franco Alfano, Transcending Turandot" (foreword by Magda Olivero), was released in 2010. For these monographs, Dryden himself insisted on translating into English all archival material from German, Italian, and French. Since the year 2000, Dryden has regularly contributed essays and articles for the following opera houses and concert halls: San Francisco Opera; Royal Opera, Covent Garden; Metropolitan Opera, New York; Teatro Real, Madrid; Concertgebouw, Amsterdam; Gran Teatro del Liceu, Barcelona; Opéra de Paris; San Diego Opera; Wexford Festival Opera; Rome Opera; Deutsche Oper Berlin and English National Opera. He has lectured in the United States, Switzerland and Germany as well as writing articles for "Opera Quarterly", CPO Records, Naxos Records and "Die Musikforschung". Dryden was the subject of a biographical entry in volume 267 of "Contemporary Authors", published in 2008. From 2000 to 2003, Dryden was contributing editor of the German music magazine "". During this time, he was noted for numerous interviews dealing with such personalities as Magda Olivero, Carlisle Floyd, Birgit Nilsson, Astrid Varnay, Wolfgang Wagner, Simonetta Puccini, Inge Borkh, Gina Cigna, Dame Eva Turner, Maria Carbone, Adelaide Saraceni, Virginia Zeani and Alexander, Crown Prince of Yugoslavia. Dryden also befriended bestselling author Barbara Cartland. Dryden may be credited for advancing musical research in the realm of Italian operatic composers during the Fin de siècle that, until the advent of his works, centered almost exclusively on Puccini. His uncovering of original manuscripts – whether of composers Giacomo Meyerbeer and Ruggiero Leoncavallo or author E. T. A. Hoffmann – enabled many archives to acquire invaluable material.