Smart Blonde: Dolly Parton, by Stephen Miller (2008)
While Dolly's own autobiography does not stress her serious business smarts, or make a big deal out of her own success, her biographers are free to look at her from multiple angles. She's certainly more than just a pretty face.
Dolly Parton Greatest Hits Songbook, by Dolly Parton (2008)
Music for guitar, piano, and vocals.
Dolly: My Life and Other Unfinished Business, by Dolly Parton (1994)
Parton's comical and forward autobiography does not uncover the biggest Dolly mystery (What does she look like without the wigs?), but it's a fun read nonetheless.