The purpose of "Exploring the Universe" and "Exploring Mars" seems to be to catch the eye of the picture-reading young, lure them first to examine the diagrams, then to turn to the text for further enlightenment. As always, we feel that if the author and publishers were sincerely eager to educate the picture-reading public they would take time to list "further reading" at least…. The information in ["Mars"] is better organized and, because the scope is limited, more satisfactory.