'I have had v. little time for general reading. I began Moby Dick [footnote] on the weekend when term ended, and thought, despite its obvious defects of rhetoric & un-dramatic dialogue, that I liked it: but somehow I feel no inclination to go on.'
C S Lewis
Letter of 3 April 1930
And yes, the footnote informs us that Moby Dick is indeed Moby Dick, and that its author is Herman Melville.
Is it conceivable that a reader inclined to read Lewis's correspondence would not know that Herman Melville wrote Moby Dick?
But wait. I live in the United States and we have just had a presidential election. The concept of the conceivable has been re-conceived.