Roman Quests: Escape from Rome by Caroline Lawrence

This awesome story starts with Juba being woken in the night by his mother telling him they’ve been denounced and he must flee now with his three siblings. He may be the middle child but they all know he’s the leader. The kids manage to flee and get to the port before guards come for them. The three manage to get passage to the only place in the Roman Empire they might be safe – their Uncle’s house in Britannia. With plot twists and unusual allies somehow Juba, Fronto and Ursula get through their trials and even meet a grown up Flavia Gemina from Roman Mysteries!