The Lion of Delos — Anne Worboys

Virginia Sanderson realizes she is being followed when she arrives on the Greek isle of Mykonos in search of her twin sister and is soon caught up in a plot involving an international smuggling ring and murder.

When Virginia Sanderson arrived on Mykonos, one of the many Greek isles, in search of her missing twin sister, Lee she realized she was being followed. Her sister's letter had alarmed her; what was really going on at the Boutique Cleopatra, the shop Lee was managing for her boss, Kriton Fileas? Lee had always been the one who could manage on her own, yet her brief note spoke of trouble, and Virginia had felt mysteriously compelled to come to her rescue, whatever the consequences to herself and to her own safety. Virginia feared that she too was now involved, in the strange and terrifying series of events that had already caused her sister's disappearance.