Good morning #belletristbabes, she wrote on Instagram Thursday.

Im over the moon to announce #SouthandWest by #JoanDidion as the first #belletristbook!

I went through my notebooks and thought I might have something here, said Didion.

Build Series Presents Emma Roberts, Osgood Perkins, Kiernan Shipka and Lucy Boynton Discussing “The Blackcoat’s Daughter”

Credit: Steve Mack/FilmMagic

Ive yet to discover whether I did or not.

I know when most pieces are finished, but with these I never knew.

At the moment, I dont seem to be any closer to knowing.

The full interview can be foundhere.

Roberts also penned a recent essay on the book, which can be foundhere.