The story centres on a young mountain girl whose mother makes her a coat out of rags because the family cannot afford to buy her one, and comes from a real story from Dolly's childhood.

The book is due out on 18 October (16) and will include illustrations and the chance to download of the 70-year-old's song Making Fun Ain't Funny.

Dolly has been active in children's literacy programmes for several years after launching her Imagination Library in 1995. The initiative provides kids in her native East Tennessee with free books delivered in the mail each month.

Meanwhile, Dolly is preparing to release a Coat of Many Colors TV movie sequel next month (Nov16). Based on a true story from Parton's childhood, Christmas of Many Colors: Circle of Love will air in America on 30 November (16). Jennifer Nettles and Ricky Schroder will reprise their roles as Parton's parents, while nine-year-old Alyvia Alyn Lind will return as the young singer.

"This movie is about the time that mama didn't have a wedding ring and we all saved up money to buy mama a ring for Christmas," Parton told Rolling Stone Country earlier this summer (16).

The country superstar will also appear in film, as the hooker she used to admire as a kid, growing up in rural Tennessee.

Dolly has signed a four-picture deal with TV bosses at NBC and she's also developing projects inspired by her songs Jolene and The Seeker, which she also hopes to turn into a TV series.