Rock Me, Amadeus

Marrying Mozart by former opera singer Stephanie Cowell is a fictionalized portrayal of Mozart's romances with the four Weber sisters, one of whom he married. It's filled to the brim with interesting historical detail, particularly the intrigues and hardships of the spirited musical community within which Mozart revolved. While historically interesting, it's definitely not academic (nor does it strive to be). Expect a quick and satisfying read with enough romance to qualify it as a highly recommendable guilty pleasure.