In Yalda's universe, light has mass, no universal speed, and its creation generates energy. On Yalda's world, plants make food by emitting light into the dark night sky. And time is different: An astronaut might measure decades passing while visiting another star, only to return and find that just weeks have elapsed for her friends. On the farm where she lives, Yalda sees strange meteors that are entering the planetary system at an immense, unprecedented speed - and it soon becomes apparent that more of this ultra-fast material is appearing all the time, putting her world in terrible danger. An entire galaxy is about to collide with their own. There is one hope: A fleet sent straight towards the approaching galaxy, as fast as possible. Though it will feel like weeks back home, on board, millennia will pass before the collision, time enough to raise new generations, and time enough to find a way to stop the ultra-fast material. Either way, they have a chance to save everyone back on the home world.
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Noble Math to the rescue; plot & characters follow
- SciFi Kindle
Good Egan Hard SF story near ruined by the narator
As with other works by Egan, it's an excellent exploration of scientific ideas & "what if" physics thought-experiments in story form.
Other work by Egan? Otherwise Egan's works are difficult to find direct comparisons for.
The narrator has an extremely monotonous pattern to his speech. Nearly all non-dialog is spoken in the exact same pattern of intonation and emphasis on words & phrases. As though he decided that every 4th work would have higher intonation & emphasis, no matter it's actual use or importance in the sentence. Dialog isn't much better, with character voices that sound almost universally to be whining or sad.
If you're a fan of Egans work, then yes; Otherwise, the narration is likely to turn off listeners, possibly even other fans of Egan.