Keep an eye on the History Channel. They do a lot of Civil War stuff and there was one on Andersonville called "80 Acres of Hell".
Better yet there are a lot of books on the subject. MacKinlay Kantor's "Andersonville" is still the best. Even though it's a work of fiction it's based on his extensive research. I'd place it alongside "Killer Angels" as two of the more accurate historical fictions. John Ransom's "Andersonville Diaries" were written by an inmate. There are a couple of histories out there that are somewhat mediocre. But the prison is covered in enough overall histories of the conflict that you can get a good picture of what it was like.
Sir, Gone with the Wind is fiction, too, but it is one of the best books ever written about the Souths perspective of the CW. The second book, "Scarlett", is nothing like the first. Margeret Mitchell was one of the best authors ever.