The World Book Encyclopedia - W-X-Y-Z

Parents, teachers, and librarians consistently rank The World Book Encyclopedia the best general reference source because of its easy-to-use format that students find so appealing. World Book editors present information in a clear, direct style that makes each article readable. Articles start at a relatively basic level and advance in depth as they progress. More than 28,000 rich photographs and illustrations are combined with award-winning text to produce the perfect encyclopedia for students and families. No wonder it has been a staple on home, library, and classroom shelves since the first edition in 1917.