The Longest Voyage / Slow Lightning

The Longest Voyage by Poul Anderson

In search of the Aureate Cities Rovic had brought the Golden Leaper halfway round the world. Weathering hurricanes and mutiny, he meant to do what no other ship's master had done; circumnavigate the globe and return to riches and glory.

Then on a distant, barbarous island, Rovic met a shipwrecked traveler who claimed to have come on an even longer voayage. But who could believe his tale – of a ship that sailed between the stars?

Slow Lightning by Steven Popkes

Ira and Gray found the egg on an abandoned ferryboat. It was wrinkled, with smears of red and yellow, and bigger than a basketball. They weren't sure why it was there, only that it must have been there on purpose.

The next day, the egg had grown... Gray wouldn't guess what might be inside it, but Ira knew it had to be better than anything else he had on this rotten world.

Then it hatched, and then real trouble began!