This is a connected collection of short stories about the leader of a secret society pledged to protect England and their German adversary. In The Double Four, Peter is called out of retirement by that organization, which, since his departure, has morphed into a sort of private diplomatic secret service. Peter acquires a title, some nice clothes, and a new archenemy, a German spy, Bernadine. Light hearted with a bit of romance along with the action and fancy pants English dialogue. This novel is an Oppenheim classic from 1919 about a high society villain: characteristic of Oppenheims typical works, with the characters living in luxury, and a very flowing and exact story.