Gwendy's Button Box Trilogy series by Stephen King & Richard Chizmar

Gwendy's Button Box
There are three ways up to Castle View from the town of Castle Rock: Route 117, Pleasant Road, and the Suicide Stairs. Every day in the summer of 1974, twelve-year-old Gwendy Peterson has taken the stairs, which are held by strong—if time-rusted—iron bolts and zig-zag up the precarious cliffside. Then one day when Gwendy gets to the top of Castle View, after catching her breath and hearing the shouts of kids on the playground below, a stranger calls to her. There on a bench in the shade sits a man in black jeans, a black coat, and a white shirt unbuttoned at the top. On his head is a small, neat black hat. The time will come when Gwendy has nightmares about that hat… The little town of Castle Rock, Maine has witnessed some strange events and unusual visitors over the years, but there is one story that has never been told—until now.

Gwendy's Magic Feather
Something evil has swept into the small Maine town of Castle Rock on the heels of the latest winter storm. Sheriff Norris Ridgewick and his team are desperately searching for two missing girls, but time is running out. In Washington, DC, thirty-seven-year-old Gwendy Peterson couldn’t be more different from the self-conscious teenaged girl who once spent a summer running up Castle Rock’s Suicide Stairs. That same summer, she had been entrusted—or some might say cursed—with the extraordinary button box by Richard Farris, the mysterious stranger in the black suit. The seductive and powerful box offered Gwendy small gifts in exchange for its care and feeding until Farris eventually returned, promising the young girl she’d never see the box again. One day, though, the button box suddenly reappears but this time, without Richard Farris to explain why, or what she’s supposed to do with it. Between this and the troubling disappearances back in Castle Rock, Gwendy decides to return home. She just might be able to help rescue the missing girls and stop a dangerous madman before he does something ghastly. With breathtaking and lyrical prose, explores whether our lives are controlled by fate or the choices we make and what price we sometimes have to pay. Prepare to return again to Stephen King’s Castle Rock, the sleepy little town built on a bedrock of deep, dark secrets, just as it’s about to awaken from its quiet slumber once more.

Gwendy's Final Tas
When Gwendy Peterson was twelve, a mysterious stranger named Richard Farris gave her a mysterious box for safekeeping. It offered treats and vintage coins, but it was dangerous. Pushing any of its seven colored buttons promised death and destruction. Years later, the button box entered Gwendy’s life again. A successful novelist and a rising political star, she was once again forced to deal with the temptation that box represented. Now, evil forces seek to possess the button box and it is up to Senator Gwendy Peterson to keep it from them at all costs. But where can you hide something from such powerful entities? In , “horror giants” Stephen King and Richard Chizmar take us on a journey from Castle Rock to another famous cursed Maine city to the MF-1 space station, where Gwendy must execute a secret mission to save the world. And, maybe, all worlds.