Shadow photos by Gardner, Webster and others are tagged with questions (Which of these shadows was made by the biggest structure? Can you identify these?), some of which are easy to answer while others might require a peek at the answer page. There is a little science to help you figure out what time of the day or year various photos were taken; directions for making a shadow theater or clock, sundial and (that's right) colored shadows; explanations for changing shadows on the earth and moon; more photos just for fun; and at the end some visual stumpers ""to test what you know."" Sometimes challenging, sometimes amusing--an eye-catching diversion.