If you loved how Foucault's Pendulum weaves together secret symbols, hidden codes, and layers of meaning, you'll be enthralled by The Name of the Rose. Follow William of Baskerville as he unravels a series of murders in a medieval monastery—a mystery steeped in literary allegory, religious symbolism, and intellectual puzzles that echo Eco's signature labyrinthine style.

If the tangled web of conspiracy in Foucault's Pendulum drew you in, you'll find The Crying of Lot 49 irresistible. Oedipa Maas's journey into a centuries-old secret postal system is both bewildering and darkly funny, with a plot that spirals into ever more bizarre and interconnected mysteries, challenging your perception of reality.

If you enjoyed the cerebral treasure hunt and literary allusions in Foucault's Pendulum, you'll devour The Club Dumas. Lucas Corso, a rare book dealer, is drawn into a deadly mystery involving a lost manuscript and occult secrets—an adventure brimming with references to classic literature, esoteric lore, and brain-teasing enigmas.

If you appreciated Eco's playful manipulation of narrative and obsession with texts-within-texts, House of Leaves will captivate you. The story unfolds through a labyrinth of footnotes, unreliable narrators, and multiple layers of storytelling, turning the very act of reading into a puzzle—much like the mind-bending journey of Foucault's Pendulum.

If the intellectual depth and philosophical questions of Foucault's Pendulum spoke to you, The Secret History offers a similarly heady atmosphere. Follow a group of classics students at an elite college as they delve into ancient philosophy—and cross moral boundaries in pursuit of forbidden knowledge, leading to deadly consequences.