The Dark Tower

The Dark Tower is an incomplete manuscript written by C. S. Lewis that appears to be an unfinished sequel to the science fiction novel Out of the Silent Planet, though doubts have been raised about its authenticity. Perelandra instead became the second book of Lewis' Space Trilogy, concluded by That Hideous Strength. Walter Hooper, Lewis' literary executor, titled the fragment and published it in the 1977 collection The Dark Tower and Other Stories. The Lewis scholar Kathryn Lindskoog challenged the authenticity of the work, but in 2003 Alastair Fowler established its authenticity.