Flight of the Fire Thief — Terry Deary

Flight of the Fire Thief continues the hilarious fantastical adventures of Prometheus, the Greek demigod who stole fire from the gods and gave it to the human race. To escape the gods' revenge, Prometheus time-travels to Eden City, arriving in 1795. There he befriends a brave and resourceful
twelve-year-old girl named Nell. Deary skillfully interweaves two plots, with the action jumping at a whirlwind pace from ramshackle Eden City to Mount Olympus and the battlefields of the Trojan War.