Today's classrooms have no real walls! Students explore the world on field trips, during virtual journeys on the world wide web, and through the books they read. These pathways help them fly to the ends of the universe to satisfy their scientific curiosity. Again this year, the professionals of the NSTA/CBC Review Panel for Outstanding Science Trade Books for Students K-12 have been pleased to serve as travel guides, identifying the best in trade books for student explorations. Not only are these books accurate, up-to-date, and attractive, but they also represent a new, creative path to inquiry. The journey begins here--come along!