This book investigates the origins, evolution, and cultural significance of the blues as a foundational genre in American music. Elijah Wald, a musician and music historian, utilizes his extensive knowledge of folk and blues traditions to trace the genre's development from its rural roots to its global influence. The text provides a framework for understanding how the blues functions as both a personal expression and a commercial product within the broader context of 20th-century music history.

Experts and music historians frequently cite this work as a concise and accessible entry point for those seeking to understand the complexities of blues history. Readers often note that the prose is clear and avoids overly academic jargon while maintaining a high level of historical accuracy.