Hilary Mantel's next novel will be published on 5 March 2020, her publishers have announced.
The long-awaited book, the title of which was already known to be The Mirror and the Light, will complete the author's Thomas Cromwell trilogy.
The first two novels in the trilogy - Wolf Hall and Bring Up The Bodies - each won the Man Booker Prize.
The date comes after a billboard advertisment on Tuesday hinted to fans that news about the novel was imminent.
The Mirror & the Light brings to a close the trilogy Mantel began with Wolf Hall and Bring Up the Bodies and will trace the final years of Thomas Cromwell, the man who rose from nowhere to climb to the heights of power as one of the top advisors to King Henry VIII.
"When I began work on my Thomas Cromwell books back in 2005, I had high hopes, but it took time to feel out the full scope of the material. I didn't know at first I would write a trilogy, but gradually I realised the richness and fascination of this extraordinary life," said Mantel.
Erm... grabbing lunch and saw this in Leicester Sq! That rose. That line. Oh my god is the new Hilary Mantel finally coming?!?! pic.twitter.com/5tytsBqQg7— Waterstones Piccadilly (@WaterstonesPicc) May 21, 2019
"Since then I have been on a long journey, with the good companionship of archivists, artists, booksellers, librarians, actors, producers, and - most importantly - millions of readers through the world.
"I hope they will stay with me as we walk the last miles of Cromwell's life, ascending to unprecedented riches and honour and abruptly descending to the scaffold at Tower Hill. This book has been the greatest challenge of my writing life, and the most rewarding; I hope and trust my readers will find it has been worth the wait."
Tuesday's advert, which fans spotted had the font and the flower symbol similar to the styles of the first two book covers, appeared to have been replaced shortly after Waterstones drew attention to it on Twitter.
In 2015, Wolf Hall and Bring Up the Bodies were adapted into a Bafta and Emmy award-winning television series, starring Mark Rylance as Cromwell and Damian Lewis as King Henry.