The brochure promised a “moderate-to-difficult” six-mile hike on the Maine-New Hampshire branch of the Appalachian Trail, where nine-year-old Trisha McFarland was to spend Saturday with her older brother Pete and her recently divorced mother. When she wanders off to escape their constant bickering, then tries to catch up by attempting a shortcut through the woods, Trisha strays deeper into a wilderness full of peril and terror. Especially when night falls.

Trisha has only her wits for navigation, only her ingenuity as a defense against the elements, only her courage and faith to withstand her mounting fear. For solace she tunes her Walkman to broadcasts of Boston Red Sox games and the gritty performances of her hero, number thirty-six, relief pitcher Tom Gordon. And when her radio’s reception begins to fade, Trisha imagines that Tom Gordon is with her—her key to surviving an enemy known only by the slaughtered animals and mangled trees in its wake.