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In the fall of 2008, writer Sara Crowe commits suicide shortly after renting out an old farmhouse in rural Rhode Island. One month later, her editor receives a strange, anonymous package: a stack of Sara's journal entries, from the time she moved into the old house to the point of her death, wrapped in butcher paper and sent with no explanation, return address, or cover letter.

As it turns out, while wandering into the house's cellar looking for a cool place to read, Sara had discovered an incomplete manuscript written by deceased parapsychologist Charles L. Harvey, who was documenting a number of urban legends, accidents, and murders surrounding a red massive oak tree less than a hundred yards from the house (and the same tree he was found hanging from after apparently committing suicide). Curious, Sara started reading the unfinished text.

And that's when things start getting weird.

''The Red Tree'' is a [[PsychologicalHorror Psychological]]/SurrealHorror novel written by Caitlín R. Kiernan presented in the form of an ApocalypticLog. It has been nominated for the 2010 Shirley Jackson Award for Best Novel, as well as the 2010 Locus Award for Best Fantasy Novel.

Compare ''Literature/HouseOfLeaves'' (which is also about a protagonist slowly driven mad after discovering a dead man's unfinished manuscript) as well as ''Literature/TheHauntingOfHillHouse''. Not to be confused with Shaun Tan's picture book [[Literature/TheRedTree2001 of the same name]].
!!''The Red Tree'' contains examples of

* ApocalypticLog: Both Sara's journal and the unfinished book she discovers.
* {{Bizarrchitecture}}: The cellar below the farmhouse turns out to have some very unusual spacial properties.
* CastFullOfGay: To be fair, it's a rather small cast.
* CreepyBasement: It's got a wall full of occult symbols and no one ever determines quite how big it really is. [[spoiler:Constance tries and ends up traumatized by something she can't remember]].
* DrivenToSuicide: Sara, Amanda, and Harvey
* EldritchAbomination: Sara's perception of the tree seems heavily influenced by her knowledge of Lovecraft and [[Creator/ArthurMachen Machen]] (particularly ''Literature/TheGreatGodPan'', which also features an abomination taking earthly form).
* FirstPersonSmartass: Sara
* ForegoneConclusion: The editor's note in the beginning tells you that Sara committed suicide and this is her journal.
* GoneMadFromTheRevelation: Sara lampshades this trope towards the end.
-->I seem to have been afflicted with some unprecedented calm, something that settled over me while I was upstairs and which shows no signs of abating. Again, I know we're running counter to the received wisdom, in which our heroine, having glimpsed some unspeakable atrocity, parts ways with her sanity (at least for a time) and runs screaming into the night. Perhaps it's only that those sorts of books and movies are, too often, made by people who have never, themselves, stood at this threshold. Even Catherine ran screaming, that sunstroke day at ''[[Theatre/SuddenlyLastSummer Cabeza de Lobo]]''. Couldn't I at least be as weak as poor Catherine?
* HairRaisingHare: One morning, Sara finds a neon green fishing line tied from the back porch of the house to the red tree. When she reaches the end of it, she finds a rabbit killed and systematically mutilated at the tree's "altar."
%%* HauntedHeroine
* HauntedHouse: Technically speaking, it's the tree that's haunted. The house is just in its area of effect.
* {{Hellgate}}: [[spoiler:The red tree is implied to be one.]]
-->Like all doors, she tends to swing open, and so care must be taken to mind the hinges and the latch.
* TheLostLenore: Sara's late girlfriend, Amanda Tyrell, who committed suicide shortly after a really nasty fight between the two.
* TheLostWoods: Shortly after Constance moves in with Sara, she asks if she can come with Sara the next time she goes to check out the tree. [[spoiler:Half an hour into their little field trip, they realize that the tree supposedly only seventy-five yards away from the house doesn't seem to be getting any closer, and that they've passed that same small deadfall once before on this trip...]]
* LovecraftCountry: The story is set in Rhode Island and references many New England legends.
* MasochismTango: Sara remarks that her relationship with Amanda was toxic and screwed up right from the start. (The very first thing Amanda did upon meeting Sara was tell her how much she thought her books sucked.)
* MaybeMagicMaybeMundane: Played to full, terrifying effect. Since the book is so replete with MindScrew (see below), there are more or less three possible explanations for the events of the book. None of them can be said to clearly be the actual explanation, and based on the facts we learn (and keep in mind that Sarah is an UnreliableNarrator, by her own admission), all of them are more or less equally plausible.
** Magic ("overt" variety): The literal intepretation. [[spoiler: The tree is indeed an EldritchAbomination and the events of the novel occured in-universe just as described - Constance was there, the "lost picnic", basement exploration, sacrifice episode and all the interactions between the two women happened. Constance either left or was taken by the tree, and the tree is responsible for Sarah's hallucination of an empty, disused attic at the very end. Up to that point, Sarah perceives the actual, objective reality, albeit one that is influenced by supernatural events.]] More or less consistent with events as they are mentioned by Sarah.
** Magic ("subtle" variety): [[spoiler: Constance never was there to begin with, and thus, about two thirds of the plot, and the ''overt'' supernatural events, occured in Sarah's mind - hallucinations caused by madness, due to exposure to the tree, which is still an EldritchAbomination and just as malign as Sarah makes it out to be. The nature of the tree would be the same, but instead of that last scene being hallucinatory, everything else ''but'' that scene was. Sarah's insanity is clearly much more severe in this case, whereas the tree "only" affects her mind, not physical reality.]] Again, this explanation would be equally consistent with the mentioned events, and with the effect the tree seems to have on people judging by Harvey's manuscript.
** Mundane: Probably the most terrifying one: [[spoiler: the tree might just be that: only a tree, just the way Sarah perceived it while visiting it alone for the very first time before Constance's arrival. It's precisely the ''manuscript'', written by a clearly insane Harvey, that lodges itself in Sarah's just as clearly unstable mind, while she's still coping with Amanda's death, and triggers a severe bout of hallucinations and paranoia. No supernatural causes whatsoever, just a result of reading the wrong kind of book at the wrong time while being in an unstable state of mind, coupled with an overactive imagination.]] That last explanation may seem less probable at first, however [[spoiler: there are several (easily overlooked) hints at various points of the novel that the actual, physical events connected to the tree, such as the deaths of several people, have not been reported widely, outside the sources that Harvey describes - which Sarah is in no position to check thoroughly. It is quite possible that all of the folktales about the tree and the grisly events connected to it were ''invented'' by Harvey and occur only in his book.]]
* MindScrew: It's really impossible to tell what's real and what isn't.
* NightmareFetishist: Amanda made custom artwork on commission from such people. Her specialty can best be described as "photographing what cannot be photographed."
* OurGhostsAreDifferent: DiscussedTrope, neither Sara or Constance believe in an afterlife or the supernatural. Still they speculate on the existence and nature of ghosts, settling on [[DoingInTheWizard glitches in space-time.]]
* PerpetualPoverty: Sara is living off of a dwindling, irregular paycheck, which is why she doesn't move out immediately when weird shit starts happening -- she literally can't afford to.
* PosthumousCharacter: Amanda Tyrell
* PsychologicalHorror: Sara's increasingly unstable mental state plays a huge role in the novel.
* SanitySlippage: Sara and Constance, [[spoiler:if Constance ever existed in the first place]].
* SpookyPainting: Amanda made really screwed up photoshop montages for a living. [[spoiler:When Sara goes up to the attic shortly after Constance leaves, she discovers seven blank canvases with tiny notes attached to each of them. After she reads them all, she looks back at the canvases to find they've been replaced with Francis Bacon-inspired paintings of contorted, mutilated women]].
%%* SurrealHorror
* ThroughTheEyesOfMadness: As Sara's journal entries progress, it becomes less and less clear if all the weird goings on are actually happening, or just in her and Constance's head. [[spoiler:In the final entries, Sara says that she's read the previous entries and doesn't recall even half of the events actually ever happening. She also notes that she checked the attic after Constance disappeared, only to find the place just as dusty and unused as it was before she moved in]].
* UltimateEvil: Sara becomes convinced the tree is merely a mask for some primordial, malignant entity capable of searing her mind.
* UnreliableNarrator: Lampshaded. Sara notes in her entries that she's basically paraphrasing all of the dialogue she writes down from memory, which she admits isn't all that great (not to mention the fact that she ''might'' be going insane). She's also shown to be very familiar with the works of Lovecraft and related authors, and not to mention some of the dark folklore surrounding New England. She even drops the name of the trope:
-->"I've had more than one heated "discussion" with readers and other writers regarding the use of unreliable narrators... The truth, of course, is that ''all'' first-person narrators are, by definition, unreliable, as all memories are unreliable. We could quibble over varying degrees of reliability, but, in the end, unless the person telling the tale has been blessed with total recall (which, as some psychologists have proposed, may be a myth, anyway), readers must accept this inherent fallibility and move the fuck on.
* WhamLine: The [[spoiler: very last journal entry by Sarah, being the last three or so]] pages, in their entirety. Hell, the entire [[spoiler: ninth, final]] chapter is a WhamEpisode, but especially those last pages.
* WhatBeautifulEyes: Sara is rather fond of Constance's drowsy, red-brown eyes.