You and Whose Army? by Greg Egan

You and Whose Army? by Greg Egan (Clarkesworld, October 2020) gets off to a fairly leisurely start with Rufus meeting a woman who knows Linus, his brother: it materialises that Rufus and Linus share memories, and that he has disappeared. We also learn, later on in the story, that there are four brothers (the others are Caius and Silus), and that they were originally part of a cult that biologically modified them as a part of an attempted hive-mind project that was later shut down by the authorities (we find most of this out when Rufus consults a PI called Leong about his brother’s disappearance):

Leong paused expectantly, giving him a chance to explain what he meant, but when he remained silent she tried prompting him. “You live in Adelaide, right? So do you meet up in person regularly?”
“Not in person.” Rufus clenched his fists and inhaled slowly. “We have neural links. All four of us. We share each other’s memories. They took us off the boat when we were eight.”
Leong was clearly thrown for a moment, but she retained a professional demeanor. Rufus guessed she was in her early forties, so mid-twenties when the story broke. Unless she’d been living in a cult of her own, she’d know exactly what he was talking about.
“You were born on the Physalia?”
“That’s right.” Rufus had to give her full marks for not only recalling the name, but pronouncing it correctly.
“And you and Linus are quadruplets?”
“Yes. The others are overseas, studying.” No idiotic blather confusing them with “clones.” Rufus’s experience had set the bar low, but he felt entitled to a small celebration at every sensible word that came out of her mouth.
“Forgive me if I’m not clear on exactly how this works,” Leong said. “When you say you share each other’s memories . . . ?”
“We wake up recalling what the other three did,” Rufus replied. “When we sleep, as well as consolidating our own experience into long-term memory, we receive enough data to do the same with the others’. We remember being them, as well as ourselves.

The rest of this piece is, essentially, a missing person story. When Leong produces a picture of Linus leaving Sydney airport the brothers don’t have the money to fund a worldwide search, so they create a social media app that scans submitted photographs for evidence of their brother in the background. Eventually (spoiler), they track him down to a college in France where he has won a scholarship. Further investigation reveals that Linus is being sponsored by an aging billionaire called Guinard (who may have part-funded the Physalia project).
Caius flies to France to question Linus (the point of view moves through all the four brothers during the story), and discovers that Guinard is sharing his memories with Linus and grooming him to become his successor (this is portrayed as a form of immortality for Guinard).
Events then see the three brothers attempting to kidnap Linus when they can’t convince him to spend some time on his own, unconnected to either them or Guinard—so Linus can learn to be himself, neither in their shadow, as he complains, nor as a receptacle for Guinard.
The kidnapping attempt fails when it is stopped by Guinard’s security, and the story ends with Linus thinking to himself that he doesn’t intend to be a receptacle for Guinard, only his protégé, and that he cannot reveal this deception to his brothers until the billionaire dies.
This is pretty good in parts—there is commentary about personhood, and some dry humour—and it is generally interesting, but the ending doesn’t really convince, and a lot of the story is taken up with inter-brother relationship tensions. Although this is a solid story, it struck me as Egan on cruise-control.
*** (Good). 13,050 words. Story link.