This is an international bestseller, with editions already published in Italy, Denmark, Spain, Hungary, and Greece, and with simple and complex Chinese editions, and a Korean edition, underway.

A young mouse with a lot of curiosity, Jules decides one day to squeeze through the hole in the book to see what’s going on in the world outside. He comes back bearing a “real” flower for his sister’s birthday and describes the room on the other side with passion to his family. Attracted by the unknown, they all decide to take a trip. They say their goodbyes, and haul their bags out through the hole.

This is the story of their adventures and misadventures outside, and back inside, the book. They learn that “everything you draw can become true”, and thus danger can leap from even the smallest sketch, but can also be remedied with an eraser, or by going back to the drawing board.

In six chapters filled with imagination, Domitille and Jean-Olivier Héron tell a story reminiscent of The Little Prince, Harold and the Purple Crayon, and Two Bad Mice.