Perihelion Summer by Greg Egan
My rating: 3 of 5 stars
Greg Egan’s Perihelion Summer does a mostly good job of taking a high concept science fiction premise–a black hole comes through our galaxy, possibly imperiling Earth–and marrying it to how it affects a relatively small group of people.
In this case, the people are a team on a custom-built ocean-going aquaculture vessel called the Mandjet. Early on, marine biologist Matt tries to convince his family to come aboard the Mandjet, as initial predictions expect the black hole to cause mega-tsunamis across the globe, wiping out populated coastal areas planet-wide. His family, in Australia, refuses, with his sister insisting they will move inland if the need arises.
Eventually, the trajectory of the black hole is worked out more precisely and in a way, it is even worse, as the black hole will come close enough to pull Earth out of its orbit enough to drastically alter seasons, making them far more extreme, with parts of the planet becoming uninhabitable depending on the time of year.
When this happens, the story shifts gears, becoming more a tale of survival, as the crew of the Mandjet plots a course to Antarctica, now newly habitable compared to the burning hellscape that Australia has become. There is some drama involving Matt trying to rescue his family, and pirates of a sort threatening to disrupt the Mandjet’s journey, along with the flotilla of other ships it is leading south.
Egan does a good job of evoking the horror of a dramatically changed climate, and how people adapt–some better than others. In a way, the short novel is affirming, because most of the people are depicted as willing to help others, to barter and trade for mutual benefit, to take risks for the safety of others, facing adversary with (some) humor and courage.
There are a few aspects that don’t hold up as well, though. I never felt I had a good handle on what type of person Matt is, who comes across as decent and caring, but also nondescript and weirdly flippant. The story also ends on an abrupt, odd note between Matt and his mother. I’m not sure what (if anything) Egan was going for with this, but it left me shrugging.
The overall story, though, is well-constructed, offering a fascinating “What if?” scenario that Roland Emmerich would probably love to turn into a terrible disaster movie. Recommended for anyone into hard science fiction featuring big concepts with some old-fashioned human drama mixed in.
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