Edgar Earl Christopher was an early 20th-century novelist noted for writing The Invisibles, a novel about an American terrorist organization plotting to overthrow czarist Russia.

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In The Invisibles, a secret society known as The Invisible Hand operates out of a vast series of caves near Chattanooga, Tennessee. The Invisible Hand, whose members are mostly scientists, have invented explosives of massive power, built a submarine, and created artificial diamonds, which they use to fund their activities.

The Invisibles was published in 1903 and was considered "a curious example of subculture trying to move up."^[1] Perhaps conceived before its time, The Invisibles is one of the earliest examples of a modern-style science fiction thriller.

A reviewer's assessment was "Mr. Christopher is a young writer, and his talent seems to be in the direction of plot construction and character study. He is still lacking in dramatic point; he is almost wholly lacking in finish."^[2]