"Please do not open!" is written on the mysterious package that Nemo receives. Sure enough, Nemo opens it, and then three things happen: 1. A plush figure jumps out, a greedy yeti knight called Icy-Ice-Monsta - alive and kicking! 2. It's snowing outside - in the middle of summer! 3. The yeti grows very big, two and a half meters tall! While the small town of Boring is sinking into snow and ice, Nemo and his friends are really working up a sweat. Because how do you hide a yeti? A turbulent race against time begins. School, adventure, friendship, and a lost being that wants to go home - everything is here, yet everything is completely different. The perfect book for boys and girls, beautifully told in a tongue-in-cheek way by Charlotte Habersack and elaborately illustrated by the unmistakable Fréderic Bertrand.