Perfect Evil — E.C. Sheedy

WHEN NO ONE CAN BE TRUSTED...
For five years, Hannah Stuart has taken refuge from the horrors of her past inside Kenninghall, the hundred-year-old Washington estate of her dear friend, Milo Biehle. But now, Milo has died, and in his will he has left the reclusive beauty everything, including possession of three mysterious letters that he warns her will change everything...

NO PLACE IS SAFE
For the letters are more than an inheritance; they are evidence of dark crimes--a tangled web of secrets and lies that the powerful would kill to protect. As Milo's long-lost relatives and business partners arrive at Kenninghall, Hannah can't be sure who can be trusted and who can't--especially when it comes to the rugged, intense Yates Lang, a man who seems to be hiding his own dark secrets. Now, with danger closing in, Hannah confronts the letters' shocking revelations of murder, sin, and depravity, each word a chilling proof that those we love best are sometimes far from innocent--they can be perfect evil...