Lisa Marie Presley's raw memoir "From Here to the Great Unknown" is out now. Ahead of Oprah's Riley Keough interview, these are the biggest reveals.

During a conversation with Oprah, Riley Keough reflected on her family’s legacy, sharing memories of her mother Lisa Marie Presley and her late grandfather Elvis, including Lisa’s recollections of Elvis’s struggles and her tragic final memories of him when she was just nine.

There were so many times that I found him down on the floor or unable to control his body very well,” Lisa Marie Presley writes of her father, Elvis, in her posthumous new memoir.