Donna Barba Higuera

"A girl named Petra Pena, who wanted nothing more than to be a storyteller, like her abuelita. But Petra's world is ending. Earth has been destroyed by a comet, and only a few hundred scientists and their children -- among them Petra and her family -- have been chosen to journey to a new planet. They are the ones who must carry on the human race. Hundreds of years later, Petra wakes to this new planet - and the discovery that she is the only person...

Ramón is worried about his first day at a new school, but it helps to remind El Cucuy, the monster who lives in his cactus pot, of how brave and strong they both are.