RaveThe Boston Globe\"It remains inadequately understood because subsequent scholars and collectors have reproduced the biases of those who originally collected the material and chose to keep much of it out of earshot. Jelly Roll Blues provides a major corrective to these tendencies and should appeal to any readers who want to deepen their knowledge of the foundations of American music ... Wald...is one of the most illuminating music writers working today ... Wald is truly virtuosic in the way he disentangles key lines and phrases and traces them across different sources, demonstrating how these works accumulated and discarded meanings as they moved across time and place ... enriches our sense of how the world used to sound.\