Dead in the Water — Norma Williams

Kate Marsden has stepped into her sister's shoes-literally. She hopes to impersonate Laura just long enough to face financier Victor Korbeck and find out why he has ordered Laura to bring her seven-year-old son to his island--the boy he refuses to acknowledge as his grandson. Kate seems to pass scrutiny by the family members and employees. Even Mitchell, Korbeck's hostile security chief , seems to be taken in by her masquerade. Or is he? Does he despise her for who she is -- or for who he believes her to be? When a killer strikes, will Mitchell be her defender, or her nemesis?