Secrets of the Dragon Tomb

Mars in 1816 is a world of high society, deadly danger, and strange clockwork machines. Pterodactyls glide through the sky, automatic servants hand out sandwiches at elegant garden parties, and in the north, the great dragon tombs hide marvels of Ancient Martian technology.

Twelve-year-old Edward Sullivan has always dreamed of becoming a spy like the ones he reads of in his favorite sci-fi magazine...