Ed Bronson didn't mean to build a bridge between worlds. His phosphor experiments were meant to advance television technology, nothing more. But when a woman's voice cuts through his laboratory's static, he finds himself tethered to a dying Earth, one where atomic fire has locked the sky into eternal, unbearable dawn. Miss Carlson's world is burning slowly, and she's not alone in wanting out. Smith's 1948 novel operates on a deliciously creepy premise: what if the refugees from a doomed parallel reality were already among us, wearing human faces? The tension builds not from ray guns and invasion fleets, but from the creeping paranoia of knowing something is wrong with your neighbor, your colleague, the person sitting next to you on the bus. It's Cold War anxiety given SF body. The prose has that earnest, forward-looking quality of 1940s science fiction, but the underlying dread still lands.
