Clive Barker broke the news via his Facebook page that St. Martin’s Press will release the tome on May 19, 2015! That’s the jacket art you see to the right.
Per Barker’s page:
Harry D’Amour (the hard-boiled paranormal detective from the movie Lord of Illusions) going head to head with the Hellpriest known as Pinhead (in his first literary appearance since The Hellbound Heart). A roller coaster of terror that explains who the Cenobites are, where they came from… and how their world comes to an end. The long-awaited final chapter in the Hellraiser mythos…
Holy shit, is all I can say. This has been years in the making.