Blotto, Twinks and the Rodents of the Riviera — Simon Brett

Someone has stolen valuable paintings from Tawcester Towers, ancestral home of Blotto and his sister, Twinks. Twinks tracks the thieves to France and she and Blotto go zipping off to Paris -- where they have rather a jolly time with the Left Bank bohemian set -- but before the hangovers can take hold Twinks has redirected the search to the Riviera, headquarters of that dastardly criminal mastermind, la Puce! Will the noble Blotto and the brilliant Twinks recover their paintings, vanquish la Puce, and rescue the kidnapped film star we neglected to mention?