Mustonen is one of the composing piano virtuosos of the young generation. What is remarkable in his works is that he does not give priority to 'his instrument'. He has composed pieces for strings, sonatas with piano accompaniment, orchestral works and even a piece for guitar which refers to the history of his home country Finland. In his 'Triple Concerto', the three highly virtuoso solo violins compete with a colourfully orchestrated string orchestra. As a special feature, timpani and triangle are used in an effective and sophisticated way. We now publish the piano score of this frequently performed work. Even this chamber music version reveals the spirited and simply beautiful music of Mustonen.