With more than twenty million copies sold in forty languages in ninety countries worldwide, DK "Eyewitness" been the most trusted young adult nonfiction book series for more than thirty years. Visually engaging, informative, and lively, the one-hundred-plus titles in the "Eyewitness" series focus on subjects that complement students' personal interests and areas of study to make learning simple and fun. The most trusted nonfiction series for teachers, librarians, and parentsWall charts and clip art CDs are perfect for school projects and homework helpUnique integration of words and pictures make the series an ideal match for reluctant readers and ESL students.