The Imperial Readings of the Taiping Era (Chinese: 太平御覽; pinyin: Tàipíng Yùlǎn) is a massive encyclopedia compiled by a number of officers commissioned by the imperial court of the Song Dynasty with the lead editor being Li Fang from 977 to 983 during the era of Taiping Xingguo.
This is Qing Dynasty (AD 1644 - 1912) edition, hence the copyright is expired.
Sources:[http://www.guoxue.com/wenxian/leishu/0001.htm] The Imperial Readings of the Taiping Era (Chinese: 太平御覽; pinyin: Tàipíng Yùlǎn) is a massive encyclopedia compiled by a number of officers commissioned by the imperial court of the Song