“A Night In The Lonesome October” by Roger Zelazny.
Chapter 1 starts on October First and the last chapter is Halloween night. The narrator is Jack the Ripper’s loyal dog, whose master has the grim task of periodically slaughtering the innocent in order to keep Certain Things quiet. Mad scientists, grave robbers, a witch, a vampire, and at least one werewolf are also in the picture.
[off topic]
https://bookshop.org/p/books/a-night-in-the-lonesome-october-roger-zelazny/21698425?ean=9780063421028
“A Night In The Lonesome October” by Roger Zelazny.
Chapter 1 starts on October First and the last chapter is Halloween night. The narrator is Jack the Ripper’s loyal dog, whose master has the grim task of periodically slaughtering the innocent in order to keep Certain Things quiet. Mad scientists, grave robbers, a witch, a vampire, and at least one werewolf are also in the picture.