Operation Terror
Author: first_name: Murray
last_name: Leinster
Language: English
Year: 1962

An unidentified space ship lands in a Colorado lake. Equipped with a paralyzing ray weapon, the creatures begin taking human prisoners. A lone land surveyor and a journalist are trapped inside the Army cordon, which is helpless against the mysterious enemy. Can they stop the aliens before it is too late? (Summary by Mark Nelson)