Penguin Books Limited (UK), 01.02.1985 - 235 Seiten
At the edge of the city, in the ruins of an old ampitheatre, there lives a little homeless girl called Momo. Momo has a special talent which she uses to help all her friends who come to visit her: she listens. REALLY listens. Then one day the sinister grey gentlemen arrive and silently take over the city. Only Momo has the power to resist them, and with the help of Professor Hora and his prophetic tortoise Cassiopeia, she travels beynd the boundaries of time to uncover the dark secrets of the grey gentlemen. --from the back cover.