This is a touching tribute and ardent memoir of the great Viennese director and composer who died in 1911, by his lifelong friend and admirer, the conductor Bruno Walter. From the time when the young Walter, not yet 20, heard Mahler's first symphony in Hamburg, he saw his life as one of service to Mahler's work. They collaborated at the Vienna Opera House and Walter is admirably able to describe the tempestuous, demonic, gay, dark, lyrical genius of the complex Mahler. Although Walter is not a writer, he has been able to convey the dynamic magnitude of the composer, and interpret the meaning of his work as well as the quality of the man. It is a small book, but it will reach its designated audience.