A superior death

"Recently assigned to Lake Superior, forty-year-old park ranger Anna Pigeon tries to get used to "so much water all in a row" and the odd group of people she's working with. When one couple confides that they suspect another ranger has eaten his wife, Anna laughs them off. But when the body of a diver is found among the corpses of an old shipwreck, Anna becomes suspicious of everyone."
"In a deep-water dive off the coast of Isle Royale National Park, Anna Pigeon finds herself searching for the connection between a drowned man and an age-old cargo ship.--"@en
"As Anna spends her days patrolling its shores, the surface of Lake Superior fills with tourists. In the depths below lie an ancient ship and the bones of its sailors. But when two tourists dive down to see the wreck, they discover that a new body has joined the skeletal crew."@en
"Anna Pigeon's job as U.S. National Park Service Ranger has lead her to Lake Superior--where an unaccounted-for corpse has turned up among the victims of a 70-year-old shipwreck."@en
"When the body of a diver is found among the corpses of an old shipwreck, park ranger Anna Pigeon becomes suspicious of everyone including the odd group she works with. Strong language and some violence."