It was realized early on that young people from elementary to high school age benefited from encyclopedias, and the fact that they could be written to their levels of understanding did not escape the notice of the publishers. ''The Book of Knowledge'' was published by the Grolier Society in 1910, a 24-volume set arranged by topic rather than alphabetically; it would be replaced by the 20-volume ''The New Book of Knowledge'' in 1966, rearranged back to alphabetically. | It was realized early on that young people from elementary to high school age benefited from encyclopedias, and the fact that they could be written to their levels of understanding did not escape the notice of the publishers. ''The Book of Knowledge'' was published by the Grolier Society in 1910, a 24-volume set arranged by topic rather than alphabetically; it would be replaced by the 20-volume ''The New Book of Knowledge'' in 1966, rearranged back to alphabetically. |