Note: Locus1 and Wikipedia claim that this "Ellery Queen" novel was written by Frederic Dannay & Manfred Bennington Lee. The website The Paperback Film Projector claims that, according to Francis M. Nevins, the author of "Royal Bloodline: Ellery Queen, Author and Detective", Paul W. Fairman wrote the Holmes chapters while Lee and Dannay did the framing story.

Synopsis: A novelization of "A Study in Terror". Ellery Queen reads a previously unknown Watson manuscript and comes up with a different theory of who Jack the Ripper was.