The original cover design for Tintin adventure “The Shooting Star” has been sold for $2.8 million in a near-record for a work by the boy detective’s Belgian creator Herge, a dealer said Monday. The yellowing, line sketch that Herge made for the 1942 book was bought by a European investor, said Marina David of Petits Papiers-Huberty-Breyne, specialist comic book dealers. The sale showed just how strong the market is for comic-book art. “Shooting Star” was Herge’s tenth Tintin album after he began the series in 1930 with “Tintin in the Land of the Soviets.”