Partners by Nora Roberts
You've been warned twice. Stop prying into Anne Trulane's death'. Laurel Armand may look like a fragile Southern Belle, but she's determined to prove herself as a journalist. When Susan Fisher comes to see Laurel and claims that her sister Anne was murdered, Laurel scents a story - and she's determined to get the truth. On the night of her death, Anne fled into the darkness of the New Orleans's swamp. Laurel wants to know what terrified Anne. When a copperhead snake is left on her doorstep, Laurel realizes that the warnings she is receiving mean that she's close to discovering an answer that someone doesn't want her to know.