Blue fire, and Black amber

the long version

Blue Fire:When Susan returns to South Africa as the wife of Dirk Hohenfield, she is apprehensive. Perhaps by seeing her estranged father, she can discover the answers to questions that have haunted her for years. At the center of it lies a magnificent blue diamond that disappeared, a diamond that Dirk thinks she knows something about... Black Amber:In An Ancient Land of Mosques and Minarets, The Secret Behind Her Sister's Death is Hidden When Anabel Radburn placed a desperate overseas phone call 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 identity secret while trying to piece together the broken threads of Anabel's life. Despite what Anabel's husband says, Tracy is convinced that her sister did not commit suicide. As she searches for clues in Anabel's waterfront villa, Tracy finds mystery and danger around every corner. Alone in a far-off country, Tracy must act quickly if she wants to live long enough to avenge Anabel's death.