Taiwan’s Mainland Affairs Council (MAC) has said Hong Kong customs has stepped up scrutiny of “almost every book shipment” from the island, while a logistics company has separately told bookstores to ensure their orders will not breach the city’s national security laws. Independent bookstores and logistics companies also confirmed on Wednesday that customs had stepped up checks on book shipments from Taiwan in recent months. In a reply to the South China Morning Post, a spokesman for the Customs...