This anthology captures the emergence and evolution of the detective genre through a curated selection of Victorian-era crime narratives. Michael Cox compiles a chronological progression of mystery fiction, tracing the development of the investigator archetype from the mid-19th century into the early 20th century. The collection features a variety of protagonists, ranging from eccentric geniuses to scientific observers, who navigate complex social landscapes and criminal motives. The narrative framework relies on the short story format, allowing for diverse stylistic approaches and varying degrees of deductive complexity across the different authors represented.

Readers and critics frequently highlight the value of this collection as a historical survey of the detective genre's formative years. Discussion often centers on the clear progression of investigative techniques, noting how the stories shift from atmospheric puzzles to more structured, scientific inquiries. Many appreciate the balance between famous canonical works and the inclusion of obscure pieces that provide context for the era's literary trends. The pacing is described as varied, reflecting the different narrative styles of the Victorian period, which allows readers to observe the maturation of the genre over several decades.