Book 5
THE DOLPHINS OF LAURENTUM
It's October AD 79. The arrival of a ragged man at the Geminus household sets in motion a series of events which take Flavia and her three friends to an opulent villa by the sea at Laurentum, a few miles south of Ostia. Just off the coast is a sunken wreck full of treasure which could be the answer to all their problems. But someone else is after the treasure, too. As the four children try to recover it, they solve the terrible mystery of Lupus's past.
BOOK 6
Flavia is suspicious of the new woman in her father's life, Cartilia Poplica. She's certain that Cartilia has an ulterior motive, but to find out the truth Flavia must perform twelve tasks - like the Greek hero Hercules.
Book 7
Jonathan's father, Doctor Mordecai, is summoned to Rome to help the plague victims. The four young detectives are wanted too, as the Emperor Titus believes that they can find the mysterious enemy who seeks Rome's destruction.
Can the friends prevent disaster? And what is Jonathan's secret mission?
BOOK 8
March AD 80. In Rome, the Emperor Titus has announced that there will be a hundred days of games to open his new Flavian amphitheatre (now known as the Colosseum). Suspecting that their friend Jonathan is not dead, as they had thought, Flavia, Nubia and Lupus organise an invitation to Rome on the pretence of witnessing this historic event.
