The Collapsium opens with a wonderful novella, "Once Upon a Matter Crushed" (first published in SF Age 5/99). In the late 25th century, in the 8th decade of the Queendom of Sol, gravitation and the zero-point field are pretty well understood. "Neubles," diamond-clad neutronium spheres, are in everyday use -- a standard industrial neuble masses a billion tonnes, and has a radius of 2.67 cm. Our hero, wealthy super-scientist Bruno de Towaji, is experimenting with collapsium, a dangerous, metastable material made of proton-size black holes, when he receives a Royal Summons: the new near-solar collapsiter ring is unstable, and will fall into the sun (and eat it) unless something is done...
The story is written in an engaging neo-Victorian style -- McCarthy's first experiment with literary style versus his previous 'transparent' prose. I liked it. Witty repartee, amusing pratfalls and shrewd insights abound. Bruno meets a well-married couple at a celebrity fund-raiser on Maxwell Montes, Venus:
"The love, shyness and exasperation between them radiated out in invisible rays, like infrared. Warming."
Befuddled by a bottomless beer mug, Bruno warms to the pitch:
"Would, ah, would a hundred trillion dollars be enough?"
McCarthy's sci-tech extrapolation is exotic, fun and reasonably plausible. He's clearly done his homework -- the book includes 30 pages of appendices, a glossary, technical notes (including the working equations to synthesize neubles), and respectable references. Fun stuff (really!) -- one of the highlights of the book.
The range and depth of McCarthy's imagined technologies are dazzling -- I'm reminded of Eric Drexler's pioneering "Engines of Creation," and I hope McCarthy (or someone) does a speculative science article on the technological implications, if the zero-point field explanation for gravity turns out to be correct. (If you've seen one, I'd appreciate hearing about it.) Lots more neat SF ideas where these came from...
So I was really pumped, reading the first hundred pages -- cool science, nice style, nifty characters, a big-screen space-opera storyline. What's not to like?
Well, the rest of the book? The first thud comes when Bruno is recalled to the inner system -- to fix the same problem again! Then he has to fix it a third time, with even sillier, pulpier results. His scientific competitor, and rival for the Queen's affection, turns out to be a really horrid villain... And the characters are hard to kill, because they have backups, except when they don't -- but wait, maybe they do, after all... And characters start acting, well, out of character. And there's a pointless, dangling subplot, among other loose ends. I suppose McCarthy intended to write a good old-fashioned super-science melodrama, except with real science -- but the last two-thirds of the book just didn't work, for me anyway.
Which is a pity, because "Crushed" is brilliant, and the science is so cool. Oh well -- I'd rather read an ambitious failure than a potboiler. If you're already a McCarthy fan, or crave bleeding-edge hard SF, you won't want to miss The Collapsium -- the good parts anyway. And who knows, your tolerance for melodrama may be higher than mine; other reviewers have been more generous.
But if you're new to McCarthy, I'd start with Bloom or another, earlier book -- and you should try him, he's very good. Usually. Both the Bloom and The Collapsium universes have plenty of room for more stories; maybe next time he should coast a little on the science and work harder on the fiction.