Harry Steen’s life is shadowed by two events that happened when he was younger. The first was a brief but passionate affair with an intriguing beauty in the uplands of Scotland where he was about to begin his career. She jilted him for her fiance and he left with a broken heart he believed would never heal. The second was a few years later when he was a Canadian mining executive, on a business trip to Mexico, he discovered a rare 18th century tome. The Obsidian Cloud is an account of an unexplained, true phenomenon: a black cloud with uncannily reflective properties that stalled before dispersing itself in a rain of black hail over Scotland. But it’s less this bizarre event that captures Harry’s attention than the fact that it supposedly occurred in the obscure town where, at age 21, he met his one true and unrequited love. Back at home he send the book to a rare books curator in Glasgow to see what scholars can tell him about this unusual book. The novel tells his life story: working on boats to escape Scotland and the past, chance meetings with remarkable people, being groomed for a position in a mining company and the family as well. Cloud is well written but has a weak ending.