Encyclopedia (Set of 21) - Full set All hardcover books, good condition but with inevitable yellowing of pages. The New Book of Knowledge (NBK) continues to address the information needs and after-school interests of elementary- and middle-school children at their reading levels. Illustrations are found on nearly every page, and these and the large font make this encyclopedia very child friendly. Great reading material for both young children and adults to improve on literary and reading skills. Bought the entire set at close to a thousand. Am willing to offload at a rock bottom price as I've no need for them now. Please quote your desired price. Self collection at Hougang.