Secrets of the Late Rebellion, Now Revealed for the First Time
The Secrets of the Great City
The Secrets of the German War Office
Secrets of the Andes
The Secrets of Potsdam
The Secrets of a Savoyard
The Secrets of a Kuttite
Secret Societies of the Middle Ages
Secret Societies: A Discussion of Their Character and Claims
The Secret Sharer
The Secret Service, the Field, the Dungeon, and the Escape
The Secret Service Submarine: A Story of the Present War
Secret Service; or, Recollections of a City Detective
A Secret Service: Being Strange Tales of a Nihilist
The Secret Rose
Secret Power; or, The Secret of Success in Christian Life and Work