The aliens are not coming--they're already here. Thwarted in their initial incursion by secret agent Dan Dannerman, they are armed with high-tech devices and a secret network on Earth and in space. It's up to Dannerman and a host of other Earthmen to stave off all-out war.
Original title: The Siege of Eternity
Genre: Fiction→ Science Fiction→ Alien Beings→ Alien Invasion & Post-occupation