This is a complete set of 22 volumes of The World Book Encyclopedia, published in 1991 by WORLD Book, Incorporated. The set includes dictionaries and a year book, covering a range of subjects including world music, English language, human science, country studies, and world history. The books are illustrated and cater to different levels of knowledge, from beginners to advanced readers, intermediate students, technical professionals, and business leaders. The set is a valuable resource for anyone interested in general knowledge and is a must-have for schools, libraries, and educational institutions.