Ruth Edna Kelley (1880–1946) was an influential American author and historian best known for her pioneering work on Halloween traditions and folklore. Born in 1880 in Massachusetts, she pursued her education at the University of Massachusetts and later became an accomplished writer. Kelley's passion for cultural history and her deep appreciation for folklore led her to delve into the origins and significance of various holidays, with Halloween becoming her most notable focus. Her extensive research culminated in the publication of The Book of Hallowe'en in 1919, which offered readers a comprehensive exploration of the holiday's history, customs, and cultural significance.

Kelley’s writings not only illuminated the rich tapestry of Halloween traditions but also reflected her broader interest in folklore and its role in society. As one of the first authors to provide an in-depth study of Halloween, she paved the way for future researchers and writers interested in the holiday's evolving nature. Throughout her career, Kelley contributed articles to various magazines and journals, engaging audiences with her insightful observations and captivating storytelling. Her dedication to preserving and celebrating cultural traditions has left a lasting impact on the understanding of Halloween, making her an essential figure in the realm of American folklore and holiday studies.