I Walked the Line is a chronicle of first love, long-kept secrets, betrayal, forgiveness, and the truth–told at last by Johnny Cash’s first wife, the mother of his four daughters. It is a book that had the full support of Johnny Cash, who insisted it was time for their story to be told, despite any painful revelations that might come to light as a result.

https://www.amazon.com/Walked-Line-My-Life-Johnny/dp/1416532951