Kay Kenyon's dazzling, glittery tale features an out-of-control planet-wide optical computer (the Ice of the title), space-faring gypsies, nuns who shun things religious, predator rats, and cannibalistic insane "snow witches."
The gypsies have returned to earth after 10,000 Earth years (they have become infertile) only to find the that a crystalline structure has covered the planet's green hills and blue oceans. Ship Mother Zoya (she spends most of her time in stasis) is awakened as the ship goes into Earth orbit, and is soon dispatched down to the planet to find out what's going on.
After much travail she manages to find out.
The story glides along (often at strange angles) with intelligence and flair. Well plotted, well crafted. Smile and wave from the "Kiss and Cry" area, please, Ms. Kenyon. Oh, and here's a bouquet just for you!