Summary: Joana Filipe Martinez performs the world's most difficult piano sonatas. 1. Prokofiev: Sonata No. 8 2. Beethoven: Hammerklavier 3. Rachmaninoff: Sonata No. 2 in B-flat minor 4. Scriabin: Sonata No. 5, Op. 53 Purchase now at: http://www.classicalsavings.com/store/p422/The_World%27s_Most_Difficult_Piano_Sonatas.html
