The Beckoning Ice (Wiki Coffin mysteries), Book 5

The fifth in the Wiki Coffin series finds the U.S. Exploring Expedition off Cape Horn, a grim outpost made still more threatening by the report of a corpse on a drifting iceberg, closely followed by a gruesome death on board. Was it suicide, or a particularly brutal murder? Wiki investigates, only to find himself fighting desperately for his own life.