The Ruby Circuit

A Brilliant Hacker. An Unbreakable Code. A Fortune at Stake.

When a powerful supercomputer is stolen, overnight fortunes vanish from Europe’s leading companies. Forensic technician Roger Tross is assigned to track down the elusive thief across Berlin, Prague, Vienna, and Budapest.

Teaming up with cryptographer Julia Amborn, Roger races to uncover the shadowy mastermind behind a cyber heist that co...