The God of the Hive (Mary Russell and Sherlock Holmes Series #10)

Mary Russell and her husband, Sherlock Holmes, have stirred the wrath of a murderous secret organization bent on infiltrating the government. Now they are separated and on the run, wanted by the police, and pursued across the Continent by a ruthless enemy with limitless resources and powerful connections.

Unstoppable together, Russell and Holmes will have to survive this time apart, maintaining contact only by means of coded messages and cryptic notes. But has the couple made a fatal mistake...