No Eden without... Hell, Book 9: A Reason to Live or Die

David and a team of students from Eden are preparing to go on a mission to Zatvor, the prison planet, where Gabriel's double has been sent.
David offers Greg Arsh to become his slave, as they believe that no one will dare to exclude Earth, one of the founding planets of the Community of Planets, because slavery would then exist there once again. They believe that this way, there is a chance that no one will expel Doulòs from the C.P. either. Indeed, why expel one slave-owning planet and keep another? But Dennis, a childhood friend of David's on a mission to Doulòs, dies there in a horrible way.
Naga, a young Daruman who had been imprisoned for years in the body of a Zatvor dragon, is finally freed thanks to David.