My husband read A Canticle for Leibowitz years ago; after reading it, he told me that it had convinced him that euthanasia was wrong. I’ve never forgotten this, and I’ve had an image of the book as being about an individual suffering unimaginably. I was wrong (for that story, read Mary Doria Russell’s books), but this background colored the way I read the book, since I kept waiting for the suffering to start. (Don’t worry, it happens, but it’s not like I had imagined.) The main thing I didn’t like about the book was its lack of continuity, which is why it gets 3.5/5*.
"A sinister cabal of superior writers."