The end of the First World War saw the rise of an insatiable public appetite for clever and thrilling mystery fiction and a new kind of hero – the modern crime writer. As the genre soared in popularity, so did the inventiveness of its best authors, ushering in a “Golden Age” of detective fiction. The Golden Age still casts a long shadow, with many of the authors who were published at that time still hugely popular today. Aside from novels, they all wrote short fiction – stories, serials and plays – and although many have been republished in books over the last 100 years, this book collects the ones that are impossible to find: stories that appeared in a newspaper, magazine or an anthology that has long been out of print; ephemeral works such as plays not aired, staged or screened for decades; and unpublished stories.