One of the speakers at the Louisiana Library Association (LLA) Conference this year was Robert (Bob) Mann. He is a a professor emeritus of mass communication at Louisiana State University. He held the Manship Endowed Chair in Journalism at the Manship School of Mass Communication at LSU for 18 years. He is the author of ten books, including critically acclaimed political histories of the U.S. civil rights movement, the Vietnam War, American wartime dissent, Ronald Reagan, and the 1964 presidential election. {source: https://www.robertmannbooks.com/about-robert-mann} He worked as a journalist and then for several prominent Louisiana political figures.
This book is a combination of history of the song and its popularity, biography of Jimmie Davis, and commentary both on aspects of Louisiana politics and the societal issues from the 1920s to the present. It is exceedingly well written.
So many of us have sung or heard this song sung with no understanding of the origin story. I did not know very much about the two-time governor Jimmie Davis before I read this book. As I noted above, one of the foci of the book is his complicated story.
As part of the analysis of the song, Bob Mann includes discussion of the various "covers" of the song over time. Someone who is more musically astute than I could make a great web site linking to all the different versions which have been recorded over time. I would enjoy listening to some of these while reading the stories of how they came about.
It is a well researched work with 17 pages of footnotes (technically end notes), seven pages of bibliography, and an index. Anyone doing work on Jimmie Davis or the role of this song in the American pantheon would find this a seminal work. I am very glad that I read it!
P.S. I commend reading this article about his departure from LSU. It has some interesting, pointed perspectives including on the brain drain from the state: https://slate.com/news-and-politics/2023/10/why-robert-mann-quit-lsu.html