
Book #33 of 2025:
Last to Leave the Room by Caitlin Starling
Dr. Tamsin Rivers is losing her mind. She’s not sleeping well, she’s exhibiting odd memory lapses, and she’s going long periods without remembering to eat or leave the house. She’s also studying a strange House of Leaves phenomenon where her basement seems to stretch in size whenever she isn’t looking, its floor ever so slightly further away from the ceiling each time. When it reaches far enough, an odd doorway suddenly appears that she can’t open or materially affect at all. And then an exact duplicate of herself is there too, her blank mental state giving no indication of whether she came through the mysterious portal or not.
Some of these things are objective facts, at least so far as the protagonist can tell. She’s both going crazy and experiencing a crazy event, although the causality isn’t especially clear early on. (Are the forces that summoned her doppelgänger also responsible for her deteriorating cognition, or is the other woman’s presence all a fever dream from her already unwell brain?) Eventually the plot discards the ambiguity and endorses the former option, as her condition continues to worsen. Meanwhile the naïve double is growing ever crueler and more sure of herself in a reverse of the original’s own progression, and it isn’t long before she’s taken her place and reduced the doctor to a frightened mess cowering in their home with the dwindling fragments of her memories.
This is a fascinating piece of psychological horror from the author of the equally excellent The Luminous Dead, heavy on themes of domestic abuse and with some eventual queer and disabled representation as well (the heroine sharing a complicated quasi-romantic dynamic with both her mirror self and her flinty corporate handler). The scientist’s Flowers for Algernon transformation is eerie enough to witness even without the addition of her unnatural tormenter, who like the villain in Stephen King’s Misery soon takes steps to forcibly limit her mobility. It’s a slow burn overall, and while I don’t understand either the title or the cover art — which suggests many such copies for some reason — it’s been a gripping experience to read.
Four stars instead of five simply because the peripheral stuff with the office politics, the Silicon Valley satire, and the corporation’s wider area of study isn’t developed in as much detail as I’d like, and since there are a few matters I would have preferred to get more closure on by the end. But on the level of the immediate character-driven story, this has been a real page-turner for me regardless.
[Content warning for biomedical experimentation, dehumanization, gaslighting, torture, and gore.]
★★★★☆
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