"The Continental Classics, Volume XVIII., Mystery Tales" is a collection of mystery stories authored by various writers. Collections like these often compile short stories or novellas in the mystery genre, offering readers a variety of thrilling and enigmatic tales penned by different authors.As with many anthologies or collections of mystery tales, each story within Volume XVIII likely presents its own unique mystery, featuring elements such as suspense, intrigue, and often a puzzle or crime to be solved. The stories might vary in settings, characters, and plotlines, providing readers with a diverse range of mysteries to enjoy.Unfortunately, without specific details about the included stories or authors in this particular volume, it's challenging to provide information about individual plots or authors. However, these collections typically aim to entertain and engage readers who enjoy the suspenseful and puzzling nature of mystery fiction, offering a selection of captivating tales from various authors.