50 years ago a performance of any of Mahler's musical works was extremely rare. Now, it seems no scrap of information about him is unworthy of publication. This book draws together the letters preserved at the University of Western Ontario and a few others from various collections, running from Mahler's student days in Vienna in the 1870s until the year of his death, 1911. Most of the letters are addressed to his sister, Justine Mahler-Rose, who lived with her brother a number of years before their respective marriages within one day of each other in 1902. Although one must appreciate the immense amount of scholarly work by Professor McClatchie necessary to translate, annotate and date the often undated correspondence, their content is very commonplace. Although there is the occasional interesting reference to personalities and events in Mahler's artistic career, these are infrequent and rarely detailed. There is no insight at all into his personal creative life. The most frequent topics of the letters are family health matters and money. In the book's 399 pages of text, he probably asks Justine a hundred times how many Marks or Florins he needs to send her on the first of the month. Gustav was the only one of the surviving Mahler siblings to be steadily employed, and he all but supported his two brothers and two sisters for years after their parents' deaths. Most of the letters are so mundane that no one would spend a minute with them if they were not written by Mahler, and the few interesting revelations in them have already been well covered in H. L. de la Grange's ongoing four-volume saga of the composer's life. By comparison, the recently published volume of his letters to his wife is far more insightful for someone seeking Mahler's private persona. The text is nearly error free, well footnoted, and buttressed by an identification guide to persons mentioned in the letters, but falls down in the picture section: a studio photo of Otto Mahler, who committed suicide in 1895, is labeled "Gustav Mahler," and a snapshot labeled as his wife, Alma, surely is of Justine. An index is provided. Only the most dedicated Mahlerian need bother, especially since the disparity between the information the book contains and its cover price is really immense.