Bookish appraiser Alexandra Patterson uncovers the secret history of a renegade saint in Terrell's subdued third novel (after The Map Thief
). In need of funds to spread their saint's message, the Sisters of St. Brigid decide to sell off a clutch of gold and jeweled relics. In her assessment of their value, Alexandra discovers an ancient manuscript that just might be the lost Book of Kildare, an illuminated manuscript that surpasses in beauty the Book of Kells. She confers with Trinity College professor and old flame Declan Lamb, who backs her hunch. As these contemporary amateur sleuths uncover the manuscript's mysterious origins, Terrell traces in a second plot line the life of Brigid and her faithful scribe, Decius. Despite a promising premise, Terrell's matter-of-fact storytelling and dry weaving of past and present leaves little mystery or magic for readers to pursue. (Mar.)