Air

There are four fundamental things humans require for survival: air to breathe, shelter to keep our bodies safe, water to drink, and food to eat. Take any of these away and we cannot survive for long. Shelter, water, and food, we must put in some effort to obtain. We take air for granted because it’s always there, wherever we go. But what if it wasn’t? What if we had to put effort into obtaining and managing the air we breathe, just as we do for everything else? Welcome to life on Mars. The Generation Mars series is hard science fiction scaled for kids. Sisters Cas and Ori are among the first children born on Mars. The series follows their adventures as they grow up in an environment unlike any in which children have grown up before. Following the introductory book, Scratching the Surface , each book in the series uses a fundamental element of survival as title and jumping off point: Air, Shelter, Water, Food. In book one, Air, the sisters learn about the air they breathe and about what can happen when things go wrong.