10 books in series

Mission Earth

Mission Earth is a 10-book series with 10 primary works first released in 1985 with contributions by L. Ron Hubbard.

Gli invasori tramano. Missione Terra. Volume 1
Genesi nera
The Enemy Within
An Alien Affair
Fortune of Fear
Death Quest
Voyage of Vengeance
Disaster
Villainy Victorious
The Doomed Planet