A cryptic reference to a component of a book, such as a chapter, preface, index, or epilogue, often appears as a clue in crossword puzzles. For example, the clue “Introduction’s ending (4)” might point to the answer “INTRO.” These clues test solvers’ knowledge of book structure and their ability to decipher wordplay.
Such clues contribute to the richness and complexity of crossword puzzles. They broaden the puzzle’s scope beyond general knowledge and vocabulary, engaging solvers with literary concepts. Furthermore, they can introduce solvers to less common terms related to book construction, enriching their understanding of literature and publishing. Historically, crossword puzzles have incorporated literary elements, reflecting the cultural importance of books and reading.