Astounding Stories Of Space and Time

Can we escape fate and reshape our future?
Love triumphs in this story by Murray Leinster

When it breaks in space, who ya gonna call?
An otherworldly tale by Harry Harrison

Do alternate realities exist? And would we believe the proof if we saw it? 
Something to ponder, in this story by H. Beam Piper

Strange disappearances in the remote Andes lead to a startling discovery that defies belief, in this classic Sci-Fi tale by Henry Kuttner

Part 3: As the five year deadline is about to expire, the scientists gather anxiously to see the results of their experiment.

Part 2: Marooned in an unknown territory by the McAllen Tube, Barney Chard reviews his situation.

Part 1: A con artist finds that he is the intended mark in this classic sci-fi tale by James H. Schmitz