Hide in the Dark — Frances Noyes Hart

First published in 1929, now public domain, this is a classic Hallowe'en mystery from pullitzer-winning Frances Noyes Hart. It's Hallowe'en, 1928.

A group of friends gathers at the country home of a rich young widow, somewhere near Washington. At first, it seems that they are in for a pleasant evening of games, ghost stories, and reminiscence. But as a storm rages outside, old grievances come to the surface and one of their games is destined to end in tragedy. Cut off from the outside world, they are forced to confront the terrifying fact that there is a murderer in their midst...