- Published: 1989
- Hugo Award for Best Novel, 1990 —
- Locus Award for Best Science Fiction Novel, 1990 —
What could be more commonplace than grass, or a world covered over all its surface with a wind-whipped ocean of grass? But the planet Grass conceals horrifying secrets within its endless pastures. And as an incurable plague attacks all inhabited planets but this one, the prairie-like Grass begins to reveal these secrets - and nothing will ever be the same again ...