If the Discordian hijinks, "fnords," and Hagbard Celine’s pranks made you grin, you’ll love how Oedipa Maas stumbles into the underground postal system of Tristero, where muted post horns echo the same reality-warping, tongue‑in‑cheek paranoia that swirls around Joe Malik and Simon Moon. Like the Illuminati breadcrumbs scattered through The Eye in the Pyramid, Pynchon’s stamps, bones, and secret symbols form a satirical funhouse of clues that might be a joke, a revelation, or both.

You enjoyed how the Illuminati web ensnared editors and anarchists alike—and how a prank like Operation Mindfuck could summon real danger. Eco’s trio of editors invent a Grand Plan as a game, then watch secret societies begin taking it seriously. If Hagbard’s golden submarine and Discordian riddles led you into ever‑wider cabals, Eco’s Templars, Rosicrucians, and occultists will scratch that same itch—only darker, slower, and unnervingly plausible.

If you reveled in the fragmented dossiers, fake documents, and typographic stunts around Joe Malik’s investigation, this novel turns the page into a maze. The nested manuscript about the impossible house—annotated by the unreliable Johnny Truant—mirrors the way The Eye in the Pyramid uses clippings and manifestos to warp perspective, the way Hagbard’s files and Discordian texts keep tugging you down new tunnels of meaning.

If you loved not knowing whether to trust any voice—be it Simon Moon’s occult riffs or the Illuminati’s contradictory origin stories—Nabokov’s Charles Kinbote will thrill you. His footnoted “explanations” to a 999‑line poem reshape the text into a delusion‑ridden narrative, much like how The Eye in the Pyramid lets competing accounts and prankster sources (hello, Eris) upend what you thought you knew.

If the book’s talking‑to‑Eris absurdities, reality glitches, and dark laughs (right alongside assassinations and pyramidal secrets) delighted you, O’Brien’s bicycle‑obsessed policemen and impossible logic will feel like kin. As with Hagbard Celine’s reality‑hacking and the ever‑shifting Illuminati myth, this tale keeps sliding the floor under you—funny, eerie, and profoundly strange.