Older people are notorious for sometimes wandering in their conversation, so it's no surprise that the friends of the late radio personality Henry Blaine talk and talk without saying anything. Particularly egregious is Lavina London, a 70ish radio star who turns amateur sleuth at the behest of Boulder (N.Y.) county sheriff Tod Arthur, who's been impressed by her work on an earlier case we've luckily been spared. Interrupting her memoirs to chat up old friends like Blaine soap opera announcer Will Argon, former Blaine agent Jae Patrick (why did Henry switch to young Nelson Doss?), and luncheon-hour talk show hosts Cole and Violet Hesson (why wasn't their radio contract renewed, and why did kidney transplant surgery come ``too late'' for them?), Lavina labors decorously to find a reason why somebody would have left Henry in his car with the engine running. What she'll mainly discover is another corpse (sharp old radio actress Audra Mateer, who wasn't sharp enough to keep her suspicions about Henry's death to herself) and an endless supply of blather so cozy that you'll feel a shock of relief when Jae, stuck in Manhattan traffic, calls the driver in front of her an asshole. (Don't worry: He doesn't hear.) Newcomer McCahery, who manages to do nothing with the promising radio background, contents himself with spooning soothing syrup for readers who think Jessica Fletcher lives a little too close to the edge.