If you enjoyed the labyrinthine conspiracies swirling around Hagbard Celine and the Discordians in The Illuminatus! Trilogy, you'll love the breakneck plot of Snow Crash, where Hiro Protagonist unravels a world-spanning scheme involving ancient Sumerian myths, shadowy corporations, and a mind-altering virus. The story’s frenetic pace and secretive agendas should feel right at home.

If you were fascinated by the non-linear, reality-bending structure of The Illuminatus! Trilogy, you'll be drawn into House of Leaves, where multiple unreliable narrators, footnotes within footnotes, and a story that folds in on itself all conspire to keep you guessing what’s real. The book’s fragmented, experimental style is an invitation to lose yourself in the puzzle.

If the irreverent, satirical humor and absurd situations in The Illuminatus! Trilogy made you laugh, Catch-22 will keep you grinning. Yossarian’s struggles against bureaucratic madness and the book’s relentless, witty critique of authority mirror the anarchic, subversive comedy of Shea and Wilson’s work.

If you enjoyed the dizzying array of secret organizations and the sense that everything might be connected in The Illuminatus! Trilogy, Foucault's Pendulum offers an intellectual playground where three editors invent a conspiracy—only to find it may be all too real. Eco’s labyrinthine plotting and erudite allusions will satisfy your craving for complexity.

If you relished the mind-bending philosophical themes and reality-questioning paranoia in The Illuminatus! Trilogy, VALIS will speak to you. Here, Horselover Fat’s search for meaning in a world saturated with hidden messages, divine interventions, and cosmic jokes echoes the trilogy’s playful yet profound approach to truth and illusion.