The League of Dark Men

The thrilling Department Z series continues as an assassination attempt leads to political turmoil—from the author who sold eighty million books worldwide.
Agent Gordon Craigie faces a crisis of international proportions when an attempted assassination of a Russian diplomat at a top-level international conference in London threatens negotiations.
Craigie and the Department Z team must work to ensure the safety of all the delegates whilst investigating the attack. It soon becomes increasingly obvious the attack they're dealing with was run by a highly professional organization and the team is starting to feel out of their depth.
Will Department Z be able to match wits with bullets as they attempt to take down the assassins? How will they negotiate the political minefield where one false step could lead to worldwide disaster?
"Mr. Creasey realizes that it is the principal business of thrillers to thrill."...