The 103rd Passenger. Historical Horror Suspense Detective Series (en Inglés) - S. E. Reed

Merritt Blackwood makes her living finding what others have lost-deeds, heirs, answers in brittle ink. When Senator Julian Thorne pays her to prove descent from a mysterious 1620 "passenger," she uncovers a water-warped notebook and an iron cuff that should not exist. The ink bleeds, a map below the shore reveals a "Nursery," and every source that touched the ledger either vanished or walked into the sea.

Chasing Mercy Blackwood's trail from museum vaults to a salt-slick marsh, Merritt discovers the truth: her family is not merely tied to these things-they were the Keepers who sang them to sleep. Now the seals are cracking. The senator will trade his humanity for a second birth, the sea has learned the coordinates, and the things in the tanks are waking.

Merritt must use a glass rod that screams, a legacy she didn't choose, and a voice she is only beginning to hear. If she fails, the tide won't only swallow a town-it will rewrite every family line it touches. Can a genealogist write a future when the past itself is alive and hungry?