S [Square Root] He W/ Cd

New York: Pocket Books, 1999. First edition, first printing (full number line). Duodecimo in silver wrappers (white spine); illus.; 117 pp., 18 cm. + 1 audio disc (digital; 4 3/4 in.); light edgewear and light shelfwear to wrappers; o/w wrappers are clean and free of tears; pages are clean, crisp, bright and free of marks and creases. Very good(+) to near fine copy. Paperback. ISBN: 0671035304

In English.