Gretel

The colony ship Gretel is speeding for the stars. She's supposed to be two light years away.

But she's not.

The ship's appeared in Saturn's orbit. One distress call, then silence.

With his brother aboard Gretel, Karl Nathan's got no choice but to break his promise to never go back to space. Saving the passengers and solving the mystery will take all his courage. And then some.

A deep space adventure by Sean Monaghan, author of Arlchip Burnout and
the Hidden Dome series.