When Elvis Presley's only child, Lisa Marie, died aged 54 last year she left behind an intimate request: for daughter Riley Keough to finish off her memoir based on recorded tapes and their time together.

Lisa Marie's posthumous memoir From Here to the Great Unknown has been completed by her daughter Riley Keough, who used her late mother's audio tapes to help her finish off the project. The book was released this month and in it, Lisa opens up about the aftermath of her father Elvis's death when she was nine, and its effect on her.