"The Adventure of the Orient Express" (Note: This novelette had been first published as a stand-alone chapbook by Candlelight Press, NY, 1965 as a softcover with dustjacket. There were two printings - May and September 1965.).
Chalker, Jack L.; Mark Owings (1998). The Science-Fantasy Publishers: A Bibliographic History, 1923-1998. Westminster, MD and Baltimore: Mirage Press, Ltd. p.845.
Joshi, S.T. (1999). Sixty Years of Arkham House: A History and Bibliography. Sauk City, WI: Arkham House. p.183. ISBN0-87054-176-5.
Nielsen, Leon (2004). Arkham House Books: A Collector's Guide. Jefferson, NC and London: McFarland & Company, Inc. p.154. ISBN0-7864-1785-4.