Treasure Hunt / Quest

A disgraced naval archaeologist decodes a 300-year-old Russian cipher mapping a sunken imperial treasure — but the map only becomes readable when the tide is low enough to see the wreck, and every low tide, someone else is already diving.

Zeyla Arkut, a discredited route surveyor, races a smuggler's crew across nine Ottoman waystones whose inscriptions hide a buried cache. Every stone she reads costs her another ally, and the last one may cost her the truth she has spent her life protecting.