Library of the Dead by Glenn Cooper

If you were hooked by Will Piper chasing the Doomsday Killer through clues tied to a hidden archive of death-dates—and the hush-hush vault in Area 51—you’ll love the museum-set manhunt in Relic. Lieutenant D’Agosta and Agent Pendergast unravel a string of ritualistic killings linked to a forbidden specimen and long-buried anthropological secrets. The blend of forensic sleuthing, eerie folklore, and a powerful institution guarding dangerous knowledge hits the same pulse-pounding, puzzle-forward sweet spot.

Liked how Library of the Dead braided a medieval monastery’s ledgers with Will Piper’s present-day case and a government cover-up? The Historian sends a scholar-daughter through letters and archives across Europe, following her father’s and mentor’s trail toward a figure who may be the historical Dracula. Monastic libraries, coded marginalia, and a quest that leaps from old manuscripts to present danger make this a lush, globe-trotting echo of that centuries-long mystery you enjoyed.

If the way Cooper jumps between the monastery’s origins, 20th‑century handlers, and Will Piper’s modern chase kept you rapt, The Shadow of the Wind delivers that same mosaic of timelines. Daniel’s discovery of a single author’s vanished works at the Cemetery of Forgotten Books spirals into decades of secrets, censorship, and revenge. Like the Area 51 vault of fateful volumes, the hidden library here is a catalyst for revelations that only lock into place when past and present finally align.

If you enjoyed the blend of sacred history and modern power brokers—monks who began the fatal ledgers, their guardians, and the U.S. apparatus hiding the Library in Library of the Dead—then the cat‑and‑mouse through churches and archives in The Da Vinci Code will click. Langdon and Sophie race to decode symbols while shadowy organizations and authorities close in, mirroring Will Piper’s run-ins with agencies determined to keep apocalyptic knowledge buried.

If the shock of discovering what those death‑date volumes truly mean—and how the killers exploited them—was your favorite part, The Seven Deaths of Evelyn Hardcastle doubles down on audacious twists. Aidan Bishop must solve a murder while reliving the same day in different bodies, each loop delivering a clue that recontextualizes the entire case. It has that same "wait, what?" momentum you felt as Cooper’s conspiracy snapped into focus around Will Piper.