Murder at Five Finger Light — Sue Henry

This time, Jessie unscrambles a deadly puzzle along the Alaskan Inside Passage....

Two of Jessie's friends are throwing a party at their new digs-- an old lighthouse on the Alaskan Inside Passage. Not a party in the typical sense, but one where guests earn their keep by scraping, painting, and generally restoring Five Finger Light, named after the long, low islands around it. So Jessie decides to leave her partner in crime, Alex, alone for a few days and lend a hand. With the company of old friends and a view to die for, Jessie won't soon forget this weekend--especially when she stumbles across a dead body. The death seems like an accident. But as a frantic Alex tries to reach Jessie, the isolated group learns that someone's cut the phone lines and wrecked the radio. Jessie realizes there's a killer loose on the island. Worse yet, the killing spree might not be over--even though the party certainly is....