He is reading in the late night hours from "many a quaint and curious volume of forgotten lore". Similar to the studies suggested in Poe's short story "Ligeia", this lore may be about the occult or black magic. This is also emphasized in the author's choice to set the poem in December, a month which is traditionally associated with the forces of darkness. The use of the raven—the "devil bird"—also suggests this. This devil image is emphasized by the narrator's belief that the raven is "from the Night's Plutonian shore", or a messenger from the afterlife, referring to Pluto, the Roman god of the underworld.