Topic - World Book

The World Book Encyclopedia is an encyclopedia published in the United States. The encyclopedia was designed to cover major areas of knowledge uniformly, but it shows particular strength in scientific, technical, and medical subjects. It is based in Chicago, Illinois. The first edition (1917) contained eight volumes. New editions have since appeared every year except 1920, 1924, and 1932, with major revisions in 1929 (13 volumes), 1947 (19 volumes), 1960 (20 volumes), 1971 (22 volumes), and 1988 (new typeface and page design, and some 10,000 new editorial features). Today, the company claims that World Book is the most up-to-date commercial encyclopedia, with over 2,500 pages of more than 14,000 updated in 2016. - Source: Wikipedia