They thought the flight was the beginning. It was only the warning. After unraveling a midair murder and discovering a cryptic Roman coin in Altitude of Shadows, former intelligence officer Luke Prescott and cryptologist Cass Vance are thrust into a deeper, darker game. The symbols they uncovered weren't just relics of the past; they’re messages from a killer rewriting history through blood. As bodies vanish across Europe and ancient ciphers lead to underground rites, Luke and Cass must race against time to stop a symbolic execution embedded in medieval ritual. But with each clue they crack, one truth becomes terrifyingly clear: the killer isn’t just echoing the past, he’s orchestrating the future. And he’s only just begun. Cover Description for Cipher of Bones A crumbling, centuries-old monastery looms in shadow, partially consumed by fog. Beneath it, faint outlines of skulls and bones press against translucent soil, like secrets trying to claw their way free. In the foreground, an aged medallion lies half-buried in the dirt, gleaming with carved symbols and the double flame insignia. Subtle details, like a bone mask faintly reflected in the metal, hint at the hidden threat. The overall color scheme is ash-gray and brass, with deep crimson accents, evoking mystery, ritual, and danger.