Titan, greatest satellite of Saturn, nearly half the size of Earth itself. Titan, that had given Man mekronal, the precious, mysterious catalyst that cut loose the human race from the need for the oxygen-nitrogen atmosphere of its homeland.

Titan, world of lost sphere-ships and phantasmic monsters.

Bleakly, Boone wondered if he'd ever reach it.

Or even if he did, would Eileen Rey live to see it with him? What were the odds against a woman struck down by Titan fever?

Those were questions without answers.

Weary, tight-lipped, he turned from the screen. "Nothing here. Let's try the crew quarters."

"Good enough." Once again, the ensign fell in beside him.

Overhead, the alarm bell clanged.


Boone went rigid; spun about as the com-box crackled, raw and ragged: "Top level calling! There's something in "A" passage—something awful! Get the biologist—Oh, my God—!"