Ludwig van Beethoven : Moonlight Sonata - 1st movement

It doesn't really suggest Moonlight in any way, but this movement by Beethoven is direct, powerful and deservedly popular. You can get the complete Piano Sonatas by Beethoven as follows:

• Volume 1, Volume 2 and Volume 3 from The Music Room (UK).
• Volume 1 and Volume 2 (Dover) from Sheet Music Plus (US).