The Sky Is Falling by Lester Del Rey, Science Fiction, Fantasy, Adventure

Series:

Dave stared around the office. He went to the window and stared upwards at the crazy patchwork of the sky. For all he knew, in such a sky there might be cracks. In fact, as he looked, he could make out a rift, and beyond that a . . . hole . . . a small patch where there was no color, and yet the sky there was not black. There were no stars there, though points of light were clustered around the ed