I think 'The Wendigo' is among the best Blackwood stories. It has this terrifying and otherworldly creature, the Wendigo. Blackwood does an excellent job of building up the horror and making the reader feel the cold and fear that the characters experience in the story. It's full of suspense and a great exploration of the unknown in nature.
He uses detailed descriptions of the settings. For example, in many stories, the isolated and often gloomy locations like old mansions or deep forests add to the suspense. The reader immediately feels a sense of unease.
Well, if we think about it, 'Blackwood Evil' might be a story that has been passed down through generations in a community near Blackwood. It could involve something like an ancient curse that was placed on the area. For example, there could have been a conflict long ago between two groups in Blackwood, and one group put a curse on the other, which led to all sorts of misfortunes. These misfortunes then became part of the 'Blackwood Evil' true story. It could also be related to natural phenomena that were misinterpreted as 'evil' in the past, such as strange weather patterns or geological formations that people didn't understand.
The main theme in a Jessica Blackwood novel usually centers around a character's journey of overcoming challenges and uncovering hidden truths. This could be set against a backdrop of a fantasy world or a contemporary setting.
The title does suggest that it could be a horror novel. The 'devil' is often used to create a sense of fear and dread in horror literature. But it could also cross over into other genres. Maybe it starts out as a mystery with Jessica Blackwood trying to solve a case related to the 'name of the devil' and as the story unfolds, it becomes more and more horror - filled. Or perhaps it uses horror elements to enhance a different genre like a detective story. So, we can't be certain just from the title that it is a horror novel.