Monster Blood (1992) is the third short children’s horror novel in R.L. Stine’s GOOSEBUMPS series. It’s a stand-alone, so no need to read the previous books.
While his parents are out of town, Evan has to go live with Aunt Katherine. She’s a scary one — a large hulking deaf woman with a deep voice who is often seen carrying her meat cleaver. Evan hates living at Aunt Katherine’s house, especially because she insists that his elderly dog stay chained up outside and there are bullies in Aunt Katherine’s neighborhood.