I'm currently reading Murder She Wrote: A Killing in a Koi Pond by Jessica Fletcher and Terrie Farley Moran. This book is the fifty-third book in the Murder She Wrote Mystery series.
After a fun mystery conference Jessica Fletcher heads to South Carolina to catch up with her old college friend, Dolores Nickens. It seems that her marriage to Willis, husband number three, agrees with her as Dolores appears happier than she's been in years. As delighted as Dolores is with her new husband, the wealthy businessman has a dark side. Willis changes abruptly from charming host to a belittling, nasty, and cruel man, seeming to take delight in ratcheting the tension and making his other guests uncomfortable. The next morning Jessica's morning jog on their property takes an unexpected turn when she sees a body in the koi pond. Willis is dead. Although they won't get to do touristy things and have fun reminiscing, this may turn out to be the best time for Jessica to visit. Once the sheriff determines that Jessica is correct and Willis was murdered, Dolores is sure to be the main suspect.