The Other Side of Nowhere — Murray Leinster

The RIM STAR seemed to be an ordinary enough spaceship bound for the planet Handel on a routine mission. Then young Braden, a merchant-space officer, discovered that there was something all wrong about the RIM STAR . . . The captain was wrong, the crew mutinous, and there was even something going on with the passengers. The ship was in deadly danger . . .

For centuries space travelers had dreaded a place they called the Other Side of Nowhere - a place in the universe where up was down, where right was wrong, and where all direction was lost . . .

To save the RIM STAR Braden had to bring the ship to that place of nightmare. . .