There are two recent [1999]biographies of Saint Saens (in English) that I know of. Brian Rees: Camille Saint-Saens A Life. London: Chatto & Windos[1999]. Stephen Sudd: Saint-Saens: A Critical Biography. I've read all of the first, which is a very good general biography, covering life, career and compositions, without going into much musical analysis. Stephen Sudd's book is also a biography but does more analysis of the music. My guess is that the first was aimed at the general market for biographies of cultural figures, while the second is a bit more for the specialist market. I thought both were good books about Saint-Saens, who is one of my favorite composers. As for books by him, a collection of his writings was translated in the early part of the century as Musical Memories. I remember enjoying it a few years ago. Gary