To further my knowledge in music:
Conductors in Conversation by Robert Chestermann
A collections of interviews with conductors such as Karajan, Solti, Giulini, Muti, Abbado and Levine.
Philadelphia Maestros by Phyllis White Rodriguez-Peralta
A collection of biographies on Ormandy, Muti, and Sawallisch
Symphony Orchestras of the World edited by Robert R. Craven
Includes profiles of the most famous orchestras in the world.