At the start of Krueger's superlative 10th novel featuring Tamarack County, Minn., PI Cork O'Connor (after Heaven's Keep), mining heir Max Cavanagh hires Cork to trace his missing sister, Lauren, founder of an artists' retreat--and to try to identify the sender of threatening letters to various people connected with Vermilion One, a Cavanaugh family mine, which the U.S. Department of Energy is considering for long-term nuclear waste storage. When Cork and a mine official descend into Vermilion One, they discover six bodies, five of them skeletal, which may be connected with a decades-old unsolved series of crimes known as "the Vanishings," which Cork's father looked into when he was sheriff. The sixth corpse, that of a well-dressed woman, appears to have been in the mine about a week. Rock-solid prose combines with effective characterizations and a logical if complex plot for a thrilling read. This book succeeds on every level and ought to attract the author a deservingly wide readership. (Sept.) Copyright 2010 Reed Business Information.