Secrets of the Dragon Tomb — Patrick Samphire

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 magazine, Thrilling Martian Tales. Instead, he spends his days keeping his eccentric family from complete disaster ... that is, until the villainous archeologist, Sir Titus Dane, kidnaps Edward's parents as part of a scheme to loot an undiscovered dragon tomb.

Edward and his sisters set out on a perilous pursuit across the Martian wilderness. Together they must evade Sir Titus's minions, battle mechanical nasties, and escape deadly Martian hunting machines. If they can't, they will never uncover the secrets of the dragon tomb and rescue Edward's family.