The Wicked One

"Incessantly tormented by the Grollican, a creature of the Otherworld, Colin Grant and his family flee to America from their native Highlands of Scotland." --summary, WorldCat library records of the 1977 eds. "the Grollican's misdeeds are mostly on the level of mischief" --KirkusReviews.com, review of the US ed. as published 1977-04-09 (contemporary, undated online, moderately positive)