For mystery and thriller
A mystery is a contract: every clue the reader notices has to lead somewhere. NovelGPT is an AI mystery writer, and an AI thriller writer too, that tracks each setup to its payoff and keeps a record of who knows what at every point in the story.
No sign-up. 1,000 free credits every month.
Pick the Cozy mystery, Psychological thriller or Noir Quick start, or describe the book in a sentence. Thriller, Mystery and Crime Fiction are separate genres, each with its own subgenres, point of view and typical length.
Give each person what they want, what they wrongly believe and what they fear. Then describe how each pair stands: who holds the power, and what stands between them.
Add each clue, red herring and setup as a promise to the reader, with the chapter where it should pay off. Story memory also spots hooks, foreshadowing and mysteries as it reads.
Put the crime and the alibis on the Timeline in story time, then plan the chapters in the order readers will meet them. Flashbacks link back to the moment they belong.
Draft with the AI or by hand. The AI is told what must not be revealed yet, and the consistency check quotes both passages when two chapters disagree.
In a fair-play mystery the reader should be able to solve the case, and in a thriller every reveal should feel earned. Both depend on setup and payoff, which an AI mystery writer must track, because they are easy to lose across eighty thousand words. The Promises tab shows each promise as an arc from the chapter that sets it up to the chapter that pays it off: open ones dashed, paid ones solid, and overdue ones flagged.
A red herring can sit on the same board as the real clue, with its own payoff chapter, so you always know where it gets explained away. Story memory sorts what it spots into hooks, foreshadowing, mysteries, promises and side stories, and you can edit, reopen or drop any of them.
A plot twist falls flat when a character acts on something they have not learned yet. As it reads each chapter, story memory records the facts that matter to a crime: where each person is, whether they are alive, dead, missing or away, who they have met, what they hold and know, and who learned each reveal. NovelGPT can then work out the state of the story at the start of any chapter.
Drafting uses the same record. Before the AI writes a chapter it is given the people in the scene with what they know, and a list headed Don't reveal yet: secrets recorded in later chapters and promises you planned to pay off later. The free checks also flag a person who appears after they left the story, and events that run out of order in story time, at no cost.
The Book map shows every chapter at a glance, with the acts, your key moments, whose eyes each chapter is in and a tension rating from one to five. A twist lands harder after a stretch of calm, and a thriller that never lets up wears a reader out. Suggest tension proposes a value for every chapter, and nothing is saved until you tick it.
Pick a story shape that suits the book. The Fichtean Curve builds one crisis on another, which suits a thriller, while the Seven-Point Structure gives you a midpoint and two pinch points to plan around. Drag chapters into a new order on the map and the numbers follow.
Pick a genre and subgenre in your Story setup, and every suggestion follows their conventions. Change the length, point of view and tense any time.
Default in NovelGPT: about 90,000 words · close third person · past tense
Default in NovelGPT: about 80,000 words · first person · past tense
Default in NovelGPT: about 85,000 words · close third person · past tense
In NovelGPT
Every setup tracked to its payoff. Overdue ones are flagged.
Events in story time, swimlanes per person, flashbacks linked.
Whole-book check that quotes both passages. Must fix, Worth a look or Minor.
Acts, tension, key moments and who appears where, all on one page.
It can suggest twists, but a fair one depends on clues planted earlier. Put each clue on the Promises board with its payoff chapter, and NovelGPT flags the overdue ones and quotes both passages if two chapters disagree about the facts.
They are separate genres. Mystery leans towards first person and about 80,000 words, thrillers towards close third and about 90,000, and subgenres such as Cozy Mystery, Psychological Thriller and Noir adjust the suggestions further.
Fiction can go to dark places, and the AI will help within the acceptable-use rules. It will not write usable instructions for real-world harm, such as weapons or malware, dressed up as a story, and the AI providers have their own limits, so a request may occasionally be declined.
The consistency check goes through your chapters with a brief built from story memory and sorts what it finds into Must fix, Worth a look and Minor. Each finding quotes the two passages that disagree, so you can fix the right one.
Yes. Bring in a Word, text or PDF file and NovelGPT works out where your chapters start. The AI can then read them into story memory and propose your people, places, plot and timeline, which you approve one step at a time.
Type your idea. NovelGPT will set up the book, and you write it your way.
Start your book