The volcano is about erupt. But Jess's brother is somewhere on the slopes. Can Jess and her friends find him in time? And can they use their knowledge of materials and other science to bring him back safely off the mountain? Science has never been more exciting with this attention-grabbing approach which delivers true scietific learning through an action-packed story and spectacular graphic illustrations. The science is the story is backed up through simple experiments that readers can try for themselves.