Staying with their aunts over the summer, Neil Cady, his sister Bree, and their new friends Wesley and Eric, set out to explore Greylock Hall, an abandoned psychiatric hospital which is supposed to be haunted by the ghost of Nurse Janet.
Since eighth-grader Gabriel Ashe moved into his grandmother's house he has been spending a lot of time playing in the woods with his new friend Seth, but the games Seth invents involve a child-eating monster called the Hunter, and Gabriel is not sure how much is imagination and how much real.
Readers are challenged to unravel the clues along with Viola, Sylvester, Rosie, and Woodrow, who are in pursuit of a treasure hinted at by the Masonic glyphs decorating Moon Hollow's town library.
When friends Eddie, Harris, and Maggie discover that the scary adventures in their favorite author's fictional books come true, they must find a way to close the portal that allows evil creatures and witches to enter their hometown of Gatesweed.
