Before she died at 54 last year, Lisa Marie Presley was working on her memoir with her eldest daughter Riley Keough.

Elvis Prelsey’s daughter may have had fame and fortune, but her life was plagued by tragedy.

From the death of her father at just nine years old, through her four divorces (including Michael Jackson and Nicolas Cage) to her son’s death at just 27, Lisa Marie suffered a lot.

On top of it all, in her posthumous memoir From Here to the Great Unknown, she alleged that her mother…