A Praed Street Dossier is a collection of detective fiction short stories, essays and marginalia by author August Derleth. It was released in 1968 by Mycroft & Moran in an edition of 2,904 copies. It was an associational collection to Derleth's Solar Pons series of pastiches of the Sherlock Holmes tales of Arthur Conan Doyle. The two science fiction stories, "The Adventure of the Snitch in Time" and "The Adventure of the Ball of Nostradamus", written with Mack Reynolds, were originally published in The Magazine of Fantasy and Science Fiction.