Fellowship of the Frog, The by Edgar Wallace (1875 - 1932)

In this story, a small village in rural England is the unlikely site of multiple mysterious goings-on. Dick Gordon, a young public prosecutor, and a determined police officer named Elk are on the trail of a secret society called the Frogs. Their leader is a diabolical master criminal simply known as “The Frog”. There are further interesting subplots involving the family of a pretty young lady whom Dick Gordon finds very attractive. There are plenty of other characters and a few delightful twists! - Summary by Howard Skyman