An American spy

This is the third book in the series following Milo Weaver, former employee in the top-secret CIA 'Department of Tourism'.
The second book (The Next Exit) ended with the destruction of the Department of Tourism, and most of its members, by the Chinese secret service. This book picks up after those events, with some of the former players plotting revenge. Primary players are former 'Tourists' and their Chinese adversaries; other players involve a (fictional) intelligence group at the UN and the German secret service (BND).