Aunt Dimity and the Deep Blue Sea — Nancy Atherton

The magnificent Dunrillin Castle seems like a good place to hide .. .

When Lori Shepherd's husband receives a series of death threats aimed at her and their twin boys, she retreats to a remote island off the Scottish coast and to a fabulous castle restored by an eccentric adventurer. There she is drawn into a mystery that may involve an illegal smuggling operation or worse. Why has a human skull washed up on the beach? Is a desolate island really the best place to hide from a murderer? And will Aunt Dimity's supernatural kibbitzing help Lori solve the case before it's too late?