A strange Scottish shore

Summary: "Scotland, 1906. A mysterious object discovered inside an ancient castle calls Maximilian Haywood, the new Duke of Olympia, and his fellow researcher Emmeline Truelove, north to the remote Orkney Islands. No stranger to the study of anachronisms in archeological digs, Haywood is nevertheless puzzled by the artifact: a suit of clothing, which, according to family legend, once belonged to a selkie who rose from the sea in ancient times and married the castle's first laird. But Haywood and Truelove soon discover they're not the only ones interested in the selkie's strange hide, and when their mutual friend Lord Silverton vanishes in the night from an Edinburgh street, the mystery takes a dangerous turn through time, which only Haywood's skills and Truelove's bravery can solve."--