XU BING (CHINA, B. 1955) Book From The Sky signed in Chinese, numbered and signed ‘17/100 Xu Bing’ (on the second page of the first book) woodblock print in a set 4 books, with original box each book: 45.5 x 40 cm. (17 7/8 x 15 3/4 in.) (4) box: 49 x 33.6 x 9.5 cm. (19 1/4 x 13 1/4 x 3 3/4 in.) Executed circa. 1987-1991