From the million-copy-selling author of The Roman Mysteries comes a nailbiting time-travel adventure in Roman London. Billionaire Solomon Daisy has invented a Time Machine, but only a child can travel in it! Alex Papas, a twelve-year-old boy knows a smattering of Greek and Latin. Alex's mission is to go back to Londinium through a portal. There are just three rules: 1. Naked you go and naked you must return. 2. Drink, don't eat. 3. As little interaction as possible. But Time Travel is no picnic.