A Superior Death — Nevada Barr

A ranger with the U. S. National Park Service, it is Anna Pigeon's job to help protect wild and lonely places from civilization's corrupting touch. Now duty has called her far from the serenity of her beloved desert--into a mystery and a murder held firmly in the icy grip of Lake Superior.

The inaccessible wreck, Kamloops, has rested at lake's bottom for nearly seven decades-the bodies of its ill-fated crew eerily preserved in Superior's frigid waters. But now there is an extra corpse on board--a newly slain interloper suspiciously dressed in 1920s clothing--drawing investigating park ranger Anna Pigeon into a nightmare of greed and murder ... and into the deadly close company of a killer.