The Lewis scholar
Kathryn Lindskoog advanced the theory that
The Dark Tower and other posthumously published works attributed to Lewis were
forgeries written by or at the behest of Walter Hooper, based upon her impressions of their style and questions she raised about their
provenance. Lindskoog claimed that
The Dark Tower resembled stories by other writers, including
A Wrinkle in Time by
Madeleine L'Engle (1962) and
The Planet of the Dead by
Clark Ashton Smith (1932). Others accept that the story is by Lewis, as the author's estate and the publishers assert by publishing it under his name. The oppressive atmosphere of the book is reminiscent of Lewis's own
That Hideous Strength (1945) and David Lindsay's
A Voyage to Arcturus (1920), which Lewis acknowledged as an influence.
The Dark Tower does differ to a degree from the published novels of Lewis's
The Space Trilogy in setting and subject matter. For example, Ransom becomes a marginal character, and the action takes place partly in an alternate universe. However, if, as Hooper supposes, the text was written prior to
Perelandra and
That Hideous Strength, it would have had no need to maintain consistency with an as yet unwritten series, especially considering that the tone and subject matter of the published series changes markedly between its first and last books. Margaret Wheatfield noted that "In
The Dark Tower we see an alternate reality with a dark analogue of Cambridge University, where evil magic is manifest and rampant, and people are made into automatons by the sting of a magical horn. In
That Hideous Strength evil magic is at work behind the scenes at an
ancient English university in our familiar reality, subtly corrupting the faculty by mundane means – manipulation of academic politics, offers of tempting career advances and of lucrative
real estate deals. The terrifying deviltry behind it becomes only gradually visible to the reader. At least to this reviewer, it seems entirely plausible to consider the one as an early draft of the other".
Alastair Fowler, Regius Professor Emeritus of Rhetoric and English Literature at the
University of Edinburgh, to whom Lewis served as a doctoral supervisor, wrote in 2003 that he saw portions of
The Dark Tower including the Stinging Man and discussed them with Lewis in 1952. Two quantitative
stylometric analyses have compared
The Dark Tower to other books in the Lewis space trilogy. Both analyses have supported the perception that, for whatever reason, the style of
The Dark Tower is atypical of that employed by Lewis in the trilogy. The first concluded from examination of a portion of
The Dark Towers text that "with respect to the frequency of single letters and particularly letter pairs,
The Dark Tower fragment represents a different style than the books comprising Lewis's deep space trilogy." The second concluded that "vocabulary usage in
The Dark Tower differs from that predicted by
Out of the Silent Planet and
Perelandra." ==Suggested developments==