Murder at the Marina — Janet Finsilver

She's got to solve this-or her friends are sunk . . .

Kelly Jackson, manager of the Redwood Cove Bed and Breakfast, is fond of the Doblinsky brothers, Ivan and Rudy, members of the Silver Sentinels, a crew of crime-solving senior citizens in their Northern California seaside hamlet. After she discovers a jewel-encrusted dagger-with what appears to be dried blood on the blade-on their fishing boat, they share their family history with Kelly, and she learns that the knife may be part of a set from their long-ago childhood in Russia. Its sudden reappearance is eerie, but the mystery grows much more serious when a body is found on the boat. The victim was staying at Kelly's inn, in town for a Russian Heritage Festival, and some of the organizers were clearly harboring some bitterness. But the story behind this murder seems as layered as a nesting doll-and Kelly's feeling completely at sea . . .