Auzou Book for star pilots

In the containers of Rouilleville, the dump city, Railey, her mechanic grandmother and her gecko droid Atti earn their living by cheating at droid races. When they are attacked and hunted by a Tracker, a contract killer, Railey and Atti realize that the grandmother has been hiding things from them... The only way to escape their pursuer is to fly into space, into the Waste Soup that surrounds the Earth like an impenetrable wall. It is there, among the Digger clans, where the law of the strongest reigns, that they will find the answers to their questions and discover the menace that hangs over their planet...