Four-disc box set presentation is an anthology of Pierre Boulez's early compositions; complex, radically new and quite ferociously uncompromising. Such fearless, notoriously demanding works as the second 'Piano Sonata' may be heard alongside the gorgeous ultra-modernist exoticism of 'Le Marteau sans maître' and 'Pli selon pli'. These breathtakingly ambitious works are complemented by the first recordings of Boulez as conductor, made at the Domaine musical, a society he formed in Paris during the mid- '50s to provide a platform both for modernist pieces by the likes of Webern, Messiaen and Stockhausen and works which had played a vital role in the evolution of music by such composers as Debussy and Bartok.