Anna Katharine Green (November 11, 1846 – April 11, 1935) was an American poet and novelist. She was one of the first writers of detective fiction in America and distinguished herself by writing well plotted, legally accurate stories (no doubt assisted by her lawyer father).

Violet Strange, a clever petite detective, is called upon to solve the mystery of a page gone missing from an important document. The futures of several people, including an eccentric misanthrope, a chemical scientist, a bride and groom, depend on the quick resolution of this problem. In solving one mystery, she uncovers another which dates back many years.