Richard Carlin's book "Worlds of Sound" provides a history of the record label Folkways Records, which was founded in 1940 by Moses Asch with the goal of creating an "encyclopedia of sound" by recording all types of music. Folkways Records welcomed all musicians regardless of race when other labels would not, and recorded early jazz employing musicians that were deemed "unemployable." The book also examines the close friendship of Woody Guthrie, Leadbelly, and Pete Seeger who made major contributions to folk music. While not intended for professionals, the book seeks to tell the story of Folkways Records and provide insight into the social and cultural impact of its existence.