The Depths of Time

The Depths of Time is a science fiction novel by Roger McBride Allen, also the author of The Ring of Charon.

Plot

Humans have invented a way of traveling great ditances using wormholes that send ships several decades into the past. A wormhole would send a ship 70 years into the past. While the crew is in hibernation the ship would travel for 70 years, covering several light years, and wakening the crew when it reached its destination, arriving only a couple of months after leaving. These wormholes are guarded by a special orginization as to prevent unauthorized travel into the past and possible time-contaminations and paradoxes.