Tau Zero

This Hugo Award finalist, “justifiably regarded as a classic” (SFReviews.net), is the tale of an epic space voyage where time dilation goes horribly wrong.

Aboard the spacecraft Leonora Christine, fifty crewmembers, half men and half women, have embarked on a journey of discovery like no other to a planet thirty light-years away. Since their ship is not capable of traveling faster than light, the crew will be subject to the effects of time dilation and relativity. They will age five years ...