Since its appearance in 1979, Historia de la música popular mexicana was hailed as a pioneering text. It was the first time a recognized authority figure was given the task of sorting and explaining the vast panorama of Mexican music. To write this book, Yolanda Moreno Rivas faced a shortage of testimonies, sources, and references. Perhaps no critic before the author had devoted themselves with such passion to the study of popular music. Moreno Rivas revised personal files of musicians and collectors, found forgotten sheet music, listened to cold records, and rescued articles and newspaper reports to complete this book.