I asked a friend, who is knowledgeable about music (and who is currently too busy to participate in this project), for some suggestions for music to read WAR AND PEACE to. His response:
Prokofiev wrote a whole opera based on the book, you know? .... [Y]our [other] obvious starting points are Tchaikovsky's 1812 Overture, which commemorates the Battle of Borodino, which features in the book. Then there is if course Beethoven's Eroica Symphony, which he originally dedicated to Napoleon, but which dedication he later withdrew in disgust when Napoleon crowned himself emperor (much like one of the characters in W&P becomes disillusioned with his former hero [Napoleon]).I can add that, according to Wikipedia, the song "The Gates of Delirium", by Yes, from the album Relayer, was apparently inspired by W&P.