Critic S. T. Joshi has referred to the novel as "a drearily verbose and unfocussed rehashing of old themes".[1]
According to the Friends of Arthur Machen website, "Machen's final full-length work of fiction is judged a failure by some. However, in this work, Machen's earlier exploration of the fantastic moves outward to embrace the absurd, of Kafka, Camus and Sartre. Not recommended for devotees of gothic and horror, but of potential fascination for the rest of us." [1]
Chalker, Jack L.; Mark Owings (1998). The Science-Fantasy Publishers: A Bibliographic History, 1923-1998. Westminster, MD and Baltimore: Mirage Press, Ltd. p. 44.
Joshi, S.T. (1999). Sixty Years of Arkham House: A History and Bibliography. Sauk City, WI: Arkham House. p. 99. ISBN0-87054-176-5.
Nielsen, Leon (2004). Arkham House Books: A Collector's Guide. Jefferson, NC and London: McFarland & Company, Inc. p. 80. ISBN0-7864-1785-4.