Riley Keough was joined by grandmother Priscilla Presley during a recent trip to Graceland in honor of her mother, Lisa Marie Prelsey. In support of Lisa Marie’s posthumously released memoir, From Here to The Great Unknown,

Lisa Marie Presley’s posthumous memoir details some of the late singer’s most traumatic moments, one of which is sexual abuse. In the book, titled From Here to the Great Unknown, the only child of icon Elvis Presley details disturbing allegations about her mother Priscilla Presley’s ex-boyfriend,