Time Travel Diaries: Adventure in Athens

Alex and his friend Dinu vowed never to time-travel again . . .
But now it's summer and Alex's gran has just won a luxury summer holiday for two adults and two children to Athens, the city of her birth. Alex decides to take Dinu and his Gran takes her best friend Trisha. After a welcome banquet at the hotel, all four come down with food poisoning and take to their luxurious rooms. After two days of purging Gran and Trisha are still too weak to move but the boys feel well enough to venture out of the hotel.
They are promptly abducted by Solomon Daisy, the eccentric bazillionaire who sent Alex back to Roman London half a year before. This time he wants them to go back two and a half thousand years to see what Socrates was really like. And two million pounds is already in each of their accounts.