The Global Cipher. The London Cypher, #3

The game is no longer confined to London. Holmes and Watson find themselves in Tokyo, Mumbai, and Geneva, pursuing fragments of a digital queen scattered across the world's greatest repositories of human knowledge. Behind this global conspiracy stands not one mastermind but two: the Architect and her son, the Grandmaster, a generational legacy of digital manipulation that threatens to rewrite history itself.
As the trail leads them from New York's public libraries to Swiss bank vaults, and finally back to the Tower of London, Holmes must confront an enemy who knows his every move - because she's been watching him from the beginning.