Greg Egan’s first novel, An Unusual Angle, was published in 1983, Egan being 22 at the time. It “concerns a high school boy who makes movies inside his head using a bio-mechanical camera, one that he has grown.” Nine years later, Quarantine appeared and instantly removed all doubts about Egan’s erstwhile juvenile talents.
What starts as a detective set in 2067 quickly turns into a head spinning novel about the possible existential effects of the Copenhagen interpretation of quantum mechanics – more specifically the consciousness causes collapse variant. In short: humans observing stuff limits the number of possible worlds.
If you thought the popcorn sci-fi of Dark Matter was hard, well, this is the real deal. On the other hand, compared to the only other Egan I’ve read so far – the brilliant Schild’s Ladder – this is an easier, more accessible book.
The first half is smooth reading: Nick Stavrianos, a hardboiled PI, investigates a kidnapping/closed room mystery. The specifics of the setting – Earth quarantined by “an impenetrable gray shield that slid into place around the solar system” in 2034 – seem a cool yet inconsequential backdrop at first. It’s brilliant how Egan manages to weld the two mysteries together.