Question: What is the name of the American serial killer of the 19th century on which the 1974 psychological horror novel by Robert Bloch is based?
Sentence (from "H. H. Holmes"): Herman Webster Mudgett (May 16, 1861 – May 7, 1896), better known under the name of Dr. Henry Howard Holmes or more commonly H. H. Holmes, was an American serial killer of the 19th century.
Relevant evidence: Yes