Perry Rhodan Lemuria 1: Ark of the Stars. Frank Borsch

After a tragic accident Perry Rhodan discovers a huge space ship, two miles long and traveling almost at the speed of light. The ship turns out to be an ark, carrying a population of humans who set out on their journey 55,000 years ago, from Earth – Lemurians, the legendary forefathers of mankind.
But Rhodan is not the only one to have noticed the ark. A ship of the Akons, Earth's arch enemies, has also set its sights on this galactic mystery …