Ship of Fools by Richard Paul Russon

Home to generations of humans, the starship Argonos has wandered aimlessly throughout the galaxy for hundreds of years, desperately searching for other signs of life. Now, a steady, unidentified transmission lures them toward a nearby planet, where the grisly remains of a former colony await the crew.

Haunted by what they have seen, the crew has no choice but to follow when another signal beckons the Argonos into deep space—and into the dark heart of an alien mystery...