Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Goddess:_A_Demon

Release date is 2021-03-26

an anonymous Project Gutenberg volunteer.

"The Goddess: A Demon" by Richard Marsh is a novel published in 1900. After a night of cards, John Ferguson dreams of his friend Edwin Lawrence's brutal murder—only to wake and find a blood-soaked, beautiful woman climbing through his window. When Lawrence is discovered savagely killed, Ferguson becomes entangled in a dangerous investigation involving the mysterious amnesiac woman, supernatural forces, and dark secrets. As suspects multiply and threats close in, Ferguson must uncover the truth behind a murder that defies rational explanation. (This is an automatically generated summary.)

Original publication data not identified