Paul Capon’s 1954 standalone The World at Bay was the 26th juvenile science fiction novel published by the John C. Winston company.
Professor Elrick has long suspected that Poppea, the third world of the dark star Nero, is inhabited. The Professor also believes an invasion from that doomed world is imminent. Alas, aside from his loyal teenaged assistant Jim Shannon, few believe Elrick. Instead, skeptics insist that the objects flying in formation from the Nero system toward Earth are only meteors of some sort.
Once the objects arrive at Earth, a wave of radio silence begins to spread along the terminator. Elrick was right, but the price of his vindication may be humanity’s doom.