"Sing Me Back Home" the autobiography of Merle Haggard. Merle wrote that song, "Okie From Muskogee" and Ronald Reagan pardoned him from San Quentin. He was doing at least a 20 year stretch when that happened. It's a good read even if you don't like country music. Actually, think about what your friend would enjoy and send him that. Some people can't understand Camus. I sent my older brother several copies of Scientific American magazine when he was doing time. Heady stuff that makes you forget where you are.