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How many mistakes, how many wrong choices would we like to delete?
How many words, how many silly things do we wish we hadn't said?
What if we could go back in time?
What if we could change the past and finally take control of our future?

There are many pasts and many futures, all different, governed by a simple domino effect: one tile falls and takes all the others down with it. If that same tile doesn’t fall, or falls at a different angle, the effect will be different for all the other tiles. Paris 2070: Jacques and Claire meet for the first time after many years. Jacques, a taxi-driver disillusioned with life, is working on his sixty-fourth birthday. He has no family or friends. Claire is a famous scientist, but although she has achieved success and some fame, her career has made it impossible for her to have a family and develop her other interests, like music. They spent their summers together as teenagers but there are many regrets and their lives have not turned out as they had imagined. As they talk, Claire lets something slip. In a certain place, kept under close surveillance by the army, there is a hidden wormhole, an anomaly that makes it possible to go back in time. First Jacques, and then Claire, will cross the threshold and find themselves fifty years in the past, facing those unresolved issues, those changes in direction that determined the course of their lives. Will they manage to change the past, and therefore the future? Will they manage to “save” themselves?

  • A profound book about the ability to choose, free will, second chances.

  • A return to science fiction for Italian children’s literature. 
  • The new book from the Strega Children's Prize 2019 winner.

FIRST PUBLISHER Giunti (Italy), 2020


Guido is one of the most famous Italian children’s book writers. He writes for newspapers, cinema and television. Author of over one hundred books, his stories have been translated into many languages and have won all the major literary prizes dedicated to writing for children, such as the Italian Andersen in 2009, 2015 and 2018, and the Strega Children’s Prize in 2019.