In 'Nightmare,' the compilation transcends mere storytelling to become a tapestry woven from the darkest threads of speculative fiction and horror. Edited by Francis Stevens and Gertrude Barrows Bennett, this anthology showcases a plethora of literary styles, ranging from Gothic suspense to early science fiction, enveloping the reader in an atmosphere of unease and fascination. Noteworthy for its inclusion of seminal pieces that have laid the groundwork for the horror genre, the collection stands as a testament to the breadth and depth of human imagination when exploring themes of fear, the unknown, and the supernatural. The contributing authors, Stevens and Bennett, are acknowledged pioneers in their own right, having significantly influenced the landscape of early 20th-century speculative fiction. Stevens, often heralded as 'the woman who invented dark fantasy,' alongside Bennett, recognized as one of the first major female speculative fiction writers, bring a unique historical and cultural perspective to the anthology. Their works, framed by the socio-cultural backdrop of pre- and post-WWI America, offer a poignant exploration of the anxieties and uncertainties that pervaded the era, thus aligning the collection with both literary and historical movements of its time. 'Nightmare' is an essential addition to the library of anyone fascinated by the origins and evolution of the horror and speculative fiction genres. This anthology not only provides a deep dive into the eerie, often unsettling worlds created by Stevens and Bennett but also celebrates the rich diversity of thought and narrative technique that characterizes the best of early 20th-century dark fiction. As such, it offers an unparalleled opportunity for readers to explore a wide-ranging spectrum of themes and perspectives, encouraging a deeper understanding and appreciation of this transformative period in literary history.