The first book I’ve ever written was co-written with Stephen Hawking and his daughter Lucy. It is George’s Secret Key to the Universe. It was published in the UK by Random House and in the US by Simon and Shuster, in 2007. The book went on to be translated in more than 45 languages.
After George’s adventure, I came up with Le Prince des Nuages (The Prince of the Clouds), a trilogy I wrote in French for PKJ, one of the most successful French YA publisher. Le Prince des Nuages tells the story of three friends who live above the clouds. They have to understand how our planet works to save it from a cruel tyrant who wants to turn the Earth’s climate into a weapon of war. Le Prince des Nuages has been translated in 8 languages so far and it has won some of the most prestigious French children book and popular science book awards. The first opus of the trilogy was published in 2009, the second in 2012 and the third in 2013.