This collection investigates the evolution, technical innovations, and cultural reception of twentieth-century musical composition. Nicholas Slonimsky, a renowned musicologist and lexicographer, utilizes his extensive background as a conductor and critic to analyze the shift toward modernism. The text presents a rigorous framework for understanding the complex harmonic and rhythmic structures that defined the era, drawing upon his firsthand observations of the period's most influential composers.

Experts recognize this volume as a vital primary source for understanding the intellectual climate of modern music. Readers frequently note the technical density of the prose, which reflects Slonimsky's deep immersion in the subject matter.