Petra is the happiest, most intrepid and fun girl in the neighbourhood. Her favourite games are hide and seek and giving people shocks. Boo! But then she starts having nightmares: crocodiles, bugs, monsters. Terrifying nightmares! Why don't you  play with them? said her grandmother. What? asked Petra in astonishment. I don't know how  to  do that. A picture book that is perfect for teaching children to face up to their nightmares, be brave and take their own decisions in the thing they have most power over: their own minds. With Petra, you discover that dreams are a magical place where you decide what happens!