Here are some of the sources that I’ve used for my articles:
Night Visitors: The Rise and Fall of the English Ghost Story (1977) Julia Briggs
The Victorian Supernatural (2009) Nicola Brown
The Cambridge Companion to Gothic Fiction (2002) Jerrold E. Hogle
Warnings to the Curious: A Sheaf of Criticism on M R James (2007) S T Joshi and Rosemary Pardoe
The Supernatural in Fiction (1952) Peter Penzoldt
The Ghost Story 1840-1920: A Cultural History (2012) Andrew Smith
The Penguin Encyclopaedia of Horror and the Supernatural (1989) Jack Sullivan
Terror and Wonder: The Gothic Imagination (2014) Dale Townshend
Seven Masters of Supernatural Fiction (1991) Edward Wagenknecht
Shadows in the Attic: A Guide to British Supernatural Fiction, 1820–1950 (2000) Neil Wilson
Hi, thanks for sharing