1. What are some of the theories about the original uses for Stonehenge? Which ones have the greatest scientific validity?

2. What are the best scientific explanations for how Stonehenge was built?

3. What are the myths and fairy tales that Stonehenge has inspired?

4. At the novel's end, Alma, Jackson, and Aunt Sarah are to return to Stonehenge in a year's time. Write a short story about what they find and the adventure that awaits them.

5. Aunt Sarah's expertise is used to help solve mysteries. What do real-life physical anthropologists do to help police solve crimes? How do they go about identifying skulls and bones, and what do they learn?

6. The Doom Stone mentions military bases near Stonehenge. What military bases are in the region of Stonehenge?

What are the bases for?

7. Zindel says that the moon has a nineteen-year cycle. What is...