Considered the definitive book on the historical evolution of orchestral style, with an informative and provocative Foreword by Nicolas Slonimsky, List of Musical Examples, Foreword, Preamble; 10 orchestra Preclassical, Classical, Early Romantic, Late Romantic, Impressionist, Expressionist, Neoclassical, Neoromantic, Exotic, Avant-Garde; Postscript, List of Score References, Bibliography, Index. 304 pages.
I'm not sure if it was just that I'm really interested in the topic, or that book was that engaging. Anyways... It is one of the most useful books on orchestration I've ever read. The Author shows deep knowledge of the Orchestral repertoire, even deeper than that of a master like Adler for example.