Mrs. Jayne Deverill is the central antagonist in Anthony Horowitz's The Power of Five series' book one Raven's Gate, and is mentioned in the other books. She is the counterpart of Mrs. Elvira Crow from Horowitz's prototype, unfinished series Pentagram. He escaped and found Mrs. Deverill and the cult doing dark magic rituals in the woods at night in the power plant. Some influential man was there too. Matt was discovered and Mrs. Deverill summoned two black dogs from a fire who chased him, but he was saved by Richard, who killed the dogs and adopted Matt.