This ship has been en route to a potentially-habitable planet for 250 years with strict rules in place for working and living including a maximum life expectancy. Now with the new planet within reach, there are a worrying number of survey probes that approach the planet and then... vanish? Or something, it’s unclear because the flow of information is spotty for various reasons. Factions arise about how to manage this possible problem. A very lively novel and one of the few where “one story told through multiple perspectives” didn’t bug me.