This may seem a trivially obvious, but I wasn't quite sure. I was writing another Walter M. Miller, Jr. question for the monthly theme just know, but the question was actually about Saint Leibowitz and the Wild Horse Woman, rather than A Canticle for Leibowitz. The current tag guidance for a-canticle-for-leibowitz says:
Published in 1960, A Canticle for Leibowitz is a post-apocalyptic novel from Walter M. Miller. It is widely considered one of the "classics" of science-fiction. The tag should be used for questions about the story, background, or adaptations.
Set in the Earth's future, following a nuclear conflict that left the surface of the planet devastated, and our cultures, societies, and technology scattered, Walter M. Miller's A Canticle for Leibowitz is told in three parts, covering three separate time periods and sets of characters.
Miller paints a grim depiction of mankind and our cyclical relationship with technology and conflict, interwoven with elements of issues of religion and morality.
Parts of the story have been adapted for radio or as dramatizations, and a lesser-known sequel, Saint Leibowitz and the Wild Horse Woman, was written by Miller many years later.
So the sequel is mentioned in the long description, but the short tag guidance only says to use a-canticle-for-leibowitz for "story, background, or adaptations." It seems like we can add mention of the sequel there, or make a new tag, treating A Canticle for Leibowitz as essentially the name of the two-book series. What do people think?