Of all the romantic obsessions in novelist Lisa St Aubin de Teran's life, the search for a castle occupied her the longest--until she saw the magnificent Villa Orsola deep in the Umbrian hills. Only after eagerly signing the ownership papers did she and her husband, painter Robbie Duff-Scott, discover they were the owners of a vast ruin lacking windowpanes, parts of the roof, and other essentials. A Valley in Italy recounts its restoration in the...