World Book Encyclopedia 2006 - Volume 21 (W-Z)

ONE VOLUME: Volume 21 (W-Z) 2006 World Book Encyclopedia with spinescape binding - Librarians, teachers, and parents consistently rank The World Book Encyclopedia the best on the market. Its easy-to-use and highly illustrated format appeals to a broad range of readers. World Book editors present thorough information in a clear, direct style that makes each article both substantive and understandable. Articles start with relatively basic information and advance in depth as they progress.