ちなみに英文

In the 25th century danger threatened our galaxy.

Warships from the evil empire Boskone ware attacking
a group of the galaxy's merchant vessels and cities
with new powerful weapon, and were establishing
colonies one by one.

Our Galactic Patrol built the high-speed vessel Brittania
in order to capture Boskone's top secret weapons data.

Those who carried out these operations were the Lensman,
a group of warriors especially chosen from among the galaxy
patrol force. The Lensman, endowed with the almighty power
of the "Lens", finally retrieved the secret data after a fierce
battle

However, on their return journey, they encountered a threat
for more serious than that encountered in their recent victory.