Black Amber

From the jacket

In an ancient land of Mosques and Minarets, the secret behind her sister's death is hidden. When Anabel Radburn placed a desperate overseas phonecall to her sister Tracy saying she was in great danger, Tracy chalked it up to Anabel's dramatic flair. Until the next day when Anabel's body is pulled from the Bosporus in Istanbul. Racked with guilt for not responding immediately, Tracy travels to Turkey where she keeps her idenity secret while trying to piece together the brok...