Prior to reading this, my only insight into Cash’s upbringing had been the recording from Folsom Prison in which the warden does a cringe-inducing introduction of Ray Cash, Johnny’s father.
If you want some sort of "definitive" edition, I hold the Legacy Edition [1] in very high regard as it to the best of my knowledge contains the two concerts in their entirety.
[1]: https://en.wikipedia.org/wiki/At_Folsom_Prison#Legacy_Editio...