Unified by something of an eerie, supernatural, or horrific nature occurring on Halloween, A Grave Duet: Collected Halloween Horror by Kasey Fallon, Melisa Peterson Lewis, and Rissa Miller features seven stories that explore inhuman beings and fabulous fashion, dangerously insatiable appetites, a death loop with creepy, cryptic calls, a series of fears manifesting into deaths, a story of revenge and myth involving werewolves and ghosts, a bride willing to pay an unfathomable cost to see her departed husband again, and a bleak future with a doomed family within a community rebuilding itself years after deadly sickness that drastically changed life.