Cliffhanger
A cliffhanger ends a chapter or book at a moment of unresolved tension, so the reader has to keep going. Here is how they work and how to use them without cheating.
A cliffhanger ends a chapter, an episode, or a whole book at a point of unresolved tension, leaving a question pressing enough that the reader cannot comfortably stop. The term comes from old serialized fiction that left a hero literally dangling, and the mechanism is the same: open a loop sharp enough that closing it feels necessary. It is one of the most dependable tools for momentum, the engine of the "just one more chapter" feeling.
The line between a good cliffhanger and a cheap one is honesty. A cliffhanger works when the danger is real and the eventual resolution is earned. It cheats when the next chapter waves the threat away trivially, or when the suspense came from withholding information the point-of-view character actually had. Real stakes, fairly resolved, keep the reader trusting you; tricks spend that trust fast.
Cliffhangers in series
The chapter-ending cliffhanger keeps a single book moving; the book-ending cliffhanger is how a series pulls a reader to the next installment. The latter is higher-stakes, because the reader waits longer for the payoff, so the promise has to be worth it.
How FireQuill helps
A cliffhanger raises a question, and a raised question is a promise to pay off. FireQuill keeps your open threads and promises on file, so the loop a cliffhanger opens does not get forgotten before it closes. The tension stays live until you resolve it on purpose, which is what keeps a cliffhanger from curdling into a loose end.
See how cliffhangers carry a series in how to write a book series with AI.