Menace under Marswood

For centuries the human outcasts of Mars lived wild, independent lives in the Martian outback called the Ruck. But then the mysterious men of the "New Clan" came to preach total rebellion against the Mother Planet - and that, Earth's U.N. Command could not allow. So it sent a team of its best officers to learn the secrets of the "New Clan." Unfortunately, to do the job right, the Terrans would have to cooperate with their worst enemies - the Ruckers!