The Cleopatra Curse by Katherine Roberts
The magnificent Seven Wonders series concludes with Romanic chariot race! Historical fiction meets action-packed adventure in this thrilling series for boys. Zeuxis is a 'lighthouse boy', whose duties include collecting fuel for the famous Pharos lighthouse of Alexandria and keeping its fire burning. But Zeuxis' dream is to become a charioteer, and he gets his chance when Julius Caesar plans his invasion of Egypt in 48BC to overthrow Queen Cleopatra. Caesar sends his envoys to Alexandria with instructions to create a riot on race day, so that he can invade the palace. To accomplish this, they need an inexperienced charioteer they can bend to their will!