Peachy Wu and the Floating Village by Gloria August

Olive and Violet Bright, Jack Pems and Judith Pinckney arrive in Hong Kong to visit an old family acquaintance, Peachy Wu, but before they disembark from their ship they receive an urgent telegram: their friend Harold Wuffy is in a bit of a pickle. He has just evaded brutish hooligans, only to discover two Chinese masterpieces hidden in his suitcase. And as Harold contemplates the works of art, a thief breaks into his apartment to steal the priceless treasures. The five friends set about to investigate and soon stumble upon a ring of art forgers and thieves run by a secretive businessman called the Mandarin, who is protected in his exclusive and impenetrable enclave, the Floating Village. But Peachy Wu might have just the way to infiltrate the Mandarin's domain and bringing him to justice. If you’re fast enough you might catch up with our intrepid detectives as they race about the length and breadth of Hong Kong and the New Territories solving the mystery of Peachy Wu and the Floating Village.