He Who Whispers is by John Dickson Carr. The 16th book in the Golden Age historical fiction Gideon Fell series. Miles Hammond is invited by Gideon Fell to a meeting of the fabulous Murder Club. The guest lecturer at this meeting is a Frenchman who is going to tell them about a murder he believes was committed by a vampire. On arriving at the designated restaurant, Miles finds the rest of the Murder Club is not present: only the lecturer and a another female guest. The lecturer tells them the story and suddenly Miles finds himself involved in the mystery with Gideon Fell. Fans of Golden Age mysteries will enjoy this one.
Ratings: 9th grade - 9 out of 10 - AC (some mature thematic content).