A centuries-old secret lies hidden in plain sight, etched in glass, buried in art, and guarded by those who would kill to protect it. When museum researcher Ethan Cole uncovers a Byzantine mosaic embedded with strange geometric patterns, he's drawn into a conspiracy that spans centuries. With art historian Clara Vialli, he follows a trail of symbols and manuscripts from Venice to London and Cairo, uncovering the legend of a lost archive, the Mosaic Key, that holds the power to rewrite history itself. As they race to unlock its meaning, they face an unseen enemy determined to silence the truth forever. Fast-paced and rich with historical mystery, The Mosaic Key is the first Cole & Vialli Adventure, a thriller that explores how the past shapes the present, and how far people will go to protect the myths that define them.