Gwendy's Final Task

Senator Gwendy Peterson has a problem she cannot put down. The button box, a dangerous object with eight colored buttons, has been in her keeping on and off since she was twelve, when a stranger named Richard Farris first handed it to her. It produces treats and vintage coins, but pushing any of its buttons brings death and destruction.

Gwendy is now a successful novelist as well as a rising political figure, and the box has returned to her life more than once. Forces with malicious intent now want it for themselves. Her task is to keep it from them whatever the cost, though it is far from clear where anything can be hidden from enemies this powerful.

The story moves between Castle Rock, another cursed Maine city and the MF-1 space station. On the station, Gwendy has to carry out a secret mission to save the world, and possibly every other world too.

This is horror and suspense with a supernatural core, written by Stephen King and Richard Chizmar. It is the third and last book in the Gwendy's Button Box trilogy, so readers coming to it fresh will want the earlier two first. The stakes run from a small Maine setting to space.