Sweeney (Pick Your Poison) launches the Cats in Trouble mystery series with a meandering whodunit. Jillian Hart is content making and selling cat quilts and living quietly in Mercy, S.C., with her three cats, Syrah, Chablis and Merlot. When Syrah is catnapped, Jillian finds not only the thief-thanks to a state-of-the-art alarm system installed by charming PI Tom Stewart-but also a murder mystery to solve. The cats are entertaining four-legged assistants, with traits like Chablis's human allergy and Merlot's ninja-style defensive tactics. Jillian's quirky neighbors also liven up the thin plot, particularly Tom, whose knack with alarms and computers comes in handy, and flamboyant deputy coroner Lydia Monk. Kitty-lovers will enjoy the feline trivia, but readers looking for a complex mystery will chafe at the slow pace and last-minute revelations