On the StephenKing.com website we can find the description of Finders Keepers which Scribner will but on the flap of their dustjacket.
From the Flap:
“Wake up, genius.” So begins King’s instantly riveting story about a vengeful reader. The genius is John Rothstein, a Salinger-like icon who created a famous character, Jimmy Gold, but who hasn’t published a book for decades. Morris Bellamy is livid, not just because Rothstein has stopped providing books, but because the nonconformist Jimmy Gold has sold out for a career in advertising. Morris kills Rothstein and empties his safe of cash, yes, but the real treasure is a trove of notebooks containing at least one more Gold novel.
Morris hides the money and the notebooks, and then he is locked away for another crime. Decades later, a boy named Pete Sauberg finds the treasure, and now it is Pete and his family that Bill Hodges, Holly Gibney, and Jerome Robinson must rescue from the ever-more deranged and vengeful Morris when he’s released from prison after thirty-five years.
Not since Misery has King played with the notion of a reader whose obsession with a writer gets dangerous. Finders Keepers is spectacular, heart-pounding suspense, but it is also King writing about how literature shapes a life—for good, for bad, forever.