Article continues below advertisementTaking Lisa Marie Presley Off Life Support Was 'Unbearable'Source: MEGAPriscilla Presley wrote about Lisa Marie Presley's death in her new memoir.Priscilla Presley poured her heart onto the pages of her new memoir, Softly, As I Leave You: Life After Elvis.In the new book, out on September 23, the 80-year-old The Naked Gun actress reflected on the tragedies she went through, including the day Lisa Marie Presley was taken off life support."It was the second saddest day of my life, other than losing Elvis [Presley]," Priscilla said.