You loved how The Eight braided Catherine Velis’s 1970s hunt with Mireille’s 1790s flight from Revolutionary France as the Montglane Service surfaced across eras. In People of the Book, rare book conservator Hanna Heath deciphers the Sarajevo Haggadah’s past through tiny forensic clues—a wine stain, an insect wing, cat hair—each triggering a vivid chapter in a different century. That same hopscotch structure of revelations, where each time-shift snaps another piece into place, delivers the puzzle-box satisfaction you got from tracking Charlemagne’s chess set through history.

If the Montglane Service’s secret itinerary—from abbey vaults to Napoleon’s circles—hooked you in The Eight, Foucault’s Pendulum turns that taste for deep-archive puzzles up to eleven. Editors Casaubon, Belbo, and Diotallevi stitch together Templar legends and occult scraps into a grand "Plan"—and then the Plan starts biting back. Like Catherine’s dance with chess masters and hidden players, Eco’s web of Rosicrucians, Templars, and hermetic ciphers sprawls across continents and centuries, rewarding your love of intellectually dense, high-stakes conspiracies.

As Catherine chases pieces of Charlemagne’s set and decodes ciphers in The Eight, you’re steeped in the thrill of scholarship turned life-or-death. In The Club Dumas, book detective Lucas Corso hunts a rare Dumas manuscript and a sinister grimoire, "The Nine Doors," comparing engraved plates and tracking forgeries while bodies begin to fall. The same blend of literary clues, shadowy collectors, and lethal secret-keepers you enjoyed with the Montglane Service powers this taut, elegant investigation.

If Mireille’s peril amid the French Revolution’s factions—and the abbey’s dangerous secret alliances—in The Eight fascinated you, An Instance of the Fingerpost immerses you in Restoration Oxford’s competing powers. Four narrators circle a murder tied to experimental science and church politics, with figures like Robert Boyle and John Locke brushing the edges. The same atmosphere of intrigue—where every confession may be a gambit—echoes your favorite scenes of revolutionary spies and shifting loyalties around the Montglane Service.

You connected with how The Eight showcases two capable women—Catherine Velis navigating modern conspiracies and Mireille guarding the chess pieces during the Terror. Labyrinth mirrors that energy: Alice Tanner in contemporary France and Alais in the 13th century each risk everything to safeguard a relic-driven secret. The alternating timelines, coded texts, and courageous women outmaneuvering ruthless adversaries will feel like a natural step from the Montglane Service’s deadly game.