The product is a set of 11 volumes of the World Book Encyclopedias from 1963, published by Field Enterprises Educational Corporation in the United States. The encyclopedias are in English and are suitable for beginners, intermediate, and advanced levels. They are in hardcover format and cover various subjects in general knowledge.

Volumes: B, F, G, I, M, N•O, P, Q•R, S, T, W•X•Y•Z