During the last 25 years, Dolly Parton has quietly built one of the largest literacy-focused non-profits in the world. Started as a gift for the children of her hometown of Sevierville, Tennessee, Dolly Parton’s Imagination Library is now active in all 50 states and five countries and delivers more than 1.5 million free, age-appropriate books to children every month.

The Library That Dolly Built goes behind-the-scenes of this unprecedented program to show how one of the most famous performers in the world has developed an efficient and effective program, beloved almost universally by its recipients.