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Are you Jean-Gabriel Causse, author of the books below?
Les Crayons de couleur by Jean-Gabriel Causse L'étonnant pouvoir des couleurs by Jean-Gabriel Causse Justine und die Rettung der Welt by Jean-Gabriel Causse L'étonnant pouvoir des couleurs by Jean-Gabriel Causse Les Couleurs invisibles by Jean-Gabriel Causse L'algorithme du cœur by Jean-Gabriel Causse


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