Ayn Rand was no fan of C.S. Lewis. She called the famous apologist an “abysmal bastard,” a “monstrosity,” a “cheap, awful, miserable, touchy, social-metaphysical mediocrity,” a “pickpocket of concepts,” and a “God-damn, beaten mystic.” (I suspect Lewis would have particularly relished the last of these.)
These insults and more can be found in her marginal notes on a copy of Lewis’ Abolition of Man, as printed in Ayn Rand’s Marginalia: Her critical comments on the writings of over 20 authors, edited by Robert Mayhew. Excerpts appear below, with Lewis’ writing (complete with Rand’s highlighting and underlining) on the left and Rand’s notes on the right.