Ever wondered how old the earth is, or how many galaxies there are in the universe? These questions and many more are answered in this fascinating series. Each book comes complete with a fully interactive CD-ROM including exciting internet links that take children to the most interesting and informative sites on the net. Knowledge Master is a complete, user-friendly multimedia package that's ideal for home, school or just having fun! * A perfect aid for school projects or homework tasks. * Popular subjects that children will want to learn about. * Covers a wide range of subject matter, which all comes together to create a library of information that children can refer to at any time. * Contains the latest and most up-to-date internet links. * Striking full-colour illustrations to grab and keep the child's attention. * Titles are presented in a question and answer style making the information easily understandable. * Published simultaneously in hardback for gift and institutional use, and in great value paperback that children can buy for themselves.