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How to Write a Killer Synopsis Without Losing Your Mind

Let’s be honest, writing a synopsis is every novelist’s least favourite part of the process.

Ask me to draft a 400-page novel? I’m in. Ask me to distill it into a single page? Cue blank stare.

But here’s the thing, mastering the art of the synopsis is non-negotiable if you want to get your book published.

The good news? You can learn how to write a synopsis that doesn’t just summarise your story but sells it. And in this week's Writing Mentor blog, I’m sharing the tools to do exactly that.

What Is a Synopsis and Why It Matters More Than You Think

A synopsis is a one-to-two page summary of your novel, including the key characters, major plot points, and how it all ends. Unlike the back-cover blurb, a synopsis lays all your cards on the table. No teasing, no cliffhangers.

Most agents and editors use synopses to judge your story's structure, pacing, and character arcs before they ever dive into the manuscript.

Your synopsis tells industry pros, ‘Yes, I can build a narrative that grips from beginning to end.’

How to Write a Synopsis That Sells

Here’s the step-by-step breakdown to nailing your synopsis

1. Start With a Hook

Grab attention immediately. Introduce your protagonist and the central conflict in the first paragraph.

Example: Winning €20 million should annihilate all her problems. Instead, Hannah’s windfall is about to go viral and detonate her life.

2. Stick to the Core Plot

Your synopsis isn’t the place for side quests. Follow your protagonist’s journey, hitting the major turning points. Keep it linear and clear.

3. Include the Ending (Yes, Really!)

This isn’t a teaser. Agents want the full reveal, including the climax and resolution. Occasionally an agent will request no spoilers but only if noted in their submission guidelines which you’ll have already research thoroughly.

4. Show Character Evolution

What does your protagonist learn? What changes? Plot matters, but emotional transformation seals the deal.

5. Use Clear, Engaging Language

Write it like a short story in present tense, with active voice and a clean narrative thread. Let your voice shine but keep it polished.

6. Keep It Between 500-800 Words

Unless guidelines say otherwise, aim for one single-spaced page or two if double-spaced. Concise. Compelling. Tight.

7. Revise and Get Feedback

Your first draft won’t be perfect. Give it time. Share it with critique partners or a writing coach. Psst: I offer synopsis feedback through my book coaching services. Click here to learn more.

Common Mistakes to Avoid

• Too Vague: Be specific about actions and outcomes.
• Too Long: Stick to the length. Trust me.
• Too Much Backstory: Only what's absolutely necessary.
• Too Many Names: Focus on essential characters only.

Tailor It to Your Genre

Agents know what they’re looking for. A thriller synopsis should scream high stakes. A romance should showcase emotional growth. A fantasy synopsis needs a taste of the world-building but not the whole map.

The Bottom Line

Writing a killer synopsis is hard. But it's also one of the most important tools in your querying arsenal. Nail it, and you give your manuscript the best shot at success.

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