How to Write a Logline for a Novel

A novel logline is one or two sentences that name the protagonist, the goal, the obstacle, and the stakes without dumping the plot. Write it when you know the engine of the story, then use it as a compass, not as a miniature novel.

Fantasy draft: “A mill-trained apprentice must smuggle a banned ledger through a river city before the guild that raised him can hang him for reading it.” Literary mystery draft: “A retired indexer in a coastal town agrees to finish a dead friend’s encyclopedia and finds that every missing entry is a person the town erased.” Both have a person, a job, a wall, and a cost.

Why this is difficult

Writers confuse loglines with synopses, themes, and jokes. A synopsis is a map. A theme is a claim. A tagline is an ad. A logline is the engine in a single breath.

If you cannot say the want, the middle of the book will wander. If you put the ending in the logline, you have written a spoiler, not a pitch. If you pack five protagonists into one sentence, you do not have a logline; you have a cast list.

People also mix this object up with titles. A book title that fits the story is a label. The logline is the machine. For the three-way split, see title vs logline vs tagline. Screenwriters have their own compression habits; a screenplay logline is a cousin, not a template you must copy.

The Engine Sentence Framework

The Engine Sentence Framework uses four slots:

When [situation], [protagonist] must [active want] before/despite [obstacle], or [stake].

Not all books need the “when.” Literary work can hide the clock in the stake. All books need a want you could film as behavior, even if the true war is interior.

After the sentence exists, you can outline without overplanning against it. If a subplot does not press the want or the stake, it is optional.

If you only have a vibe, a premise tool can help you list engines. Use the plot generator for premise options, not for titles. You keep the pen.

PlotnAI does not write the novel from that sentence. The sentence is a test of whether you have a novel.

Name the protagonist as a role plus a flaw or duty

“A girl” is not a protagonist. “A mill-trained apprentice who was never meant to read High Speech” is. “A woman” is not. “A retired indexer who loved being invisible” is.

Keep names out unless the name is the point. Roles travel. Names do not, in a pitch to strangers.

State the want in active language

Must smuggle, finish, hide, prove, return, refuse. Avoid learn, discover who she is, come of age unless you attach a visible task. Interior change can be the true ending. The logline still needs a verb a camera could misunderstand.

Name the obstacle and the cost

Guild, town, husband, winter, the encyclopedia’s missing names. Cost: hanging, erasure, the friend’s reputation, the apprentice’s home. Without cost, you have a chore.

Cut backstory, theme slogans, and ending spoilers

Delete “in a world where.” Delete “a story about found family.” Delete “only to find she was the queen all along” unless you are pitching a twist-forward comedy and you mean it.

Word count target: 25–45 words. Read it aloud. If you need air, you need a cut.

Read it against title and outline

If the title repeats the logline’s noun, one of them is lazy. If the outline’s midpoint does not threaten the logline’s want, the outline is a different book. Revise one to match the other on purpose.

Worked example: fantasy premise

Slots: mill apprentice; smuggle a banned ledger; guild and river law; death and exile.

Logline: “When a river-city guild forbids High Speech, a mill-trained apprentice must smuggle a banned ledger to the coast before his own masters hang him for reading it.”

Thirty-eight words. No prophecy. No map. The book can still be rich. The engine is poor and specific.

Worked example: literary mystery

Slots: retired indexer; complete a dead friend’s encyclopedia; a town that erases people; the friend’s name is next.

Logline: “A retired indexer in a fading coastal town agrees to finish her dead friend’s encyclopedia, then finds that every blank entry is a person the town has erased—and the next blank is her friend.”

The mystery is moral and procedural. The want is still a task: finish the book.

What to avoid

• Theme posters
• Five-protagonist traffic jams
• Title generators used as loglines
• Spoilers as punchlines unless that is the genre joke
• “In a world where” as a crutch

Checklist

• Role plus duty or flaw
• Active want
• Obstacle with a name
• Stake that hurts
• Under forty-five words if possible
• Title is not a duplicate
• Outline still obeys the engine

FAQ

What is a logline for a novel?

A logline is a one- or two-sentence pitch that states who the story follows, what they want, what stands in the way, and why it matters. It is not a tagline, a title, or a chapter outline.

How long should a novel logline be?

Aim for twenty-five to forty-five words. If you need a second sentence, use it for the ironic constraint or the ticking clock, not for backstory.

Should I write the logline before the outline?

Write a draft logline as soon as you have a protagonist and a want. Revise it after you know the ending. Use it to keep an outline from sprawling, not as a prison.

Is a novel logline the same as a screenplay logline?

The spine is the same—want versus obstacle—but novel loglines may carry interior stakes and a longer time scale. Do not force film jargon onto a literary book.