Which Way is Up?

Do we live on top of the earth? How would it feel to live on the bottom? What exactly do ""up'' and ``down'' mean? These are some of the questions Haines addresses in this lively, highly readable introduction to the often misunderstood concepts of force, motion and gravitation. Beginning with an explanation of how gravity works (it ``never quits''), Haines proceeds with an account of the contributions to current theory of three major thinkers: Galileo, Newton and Einstein. Amoroso's humorous drawings help to portray each scientist as human, if slightly eccentric, and to make each new concept clear and accessible. This volume directly answers the need for interesting, well-illustrated and comprehensible science books for younger readers. Ages 712. (March)