When you’re ready to pursue traditional publishing, it can be hard to know which documents to send where and when. The terms query letter and book proposal get thrown around a lot, sometimes even interchangeably. But they’re not the same. In fact, they serve very different purposes.
Let’s break down how these two tools work together—and why you need both if you want to give your book its best shot.
What Is a Query Letter?
A query letter is a short, persuasive email (usually one page or less) that introduces you and your book to an agent. Think of it as your book’s business plan: sharp, intriguing, and just enough to make someone want to learn more.
It typically includes:
A personalized opening
A pitch or hook (1–2 paragraphs that sell the concept)
A short bio
High level manuscript details
Your goal? Get the agent tor read your attached manuscript and ask to see more. Think of the query like a door-opener.
What Is a Book Proposal?
A proposal is a full pitch package that can go to an agent, but for sure goes to a publisher to shop your book.
It includes sections like:
Overview & Premise
50-word Summary
Unique Selling Proposition
Target Audience (Demographics + Psychographics)
Comparable Titles
Marketing Strategy
Author Bio
Full manuscript (for picture books)
This is where you demonstrate not just your idea, but your ability to support and sell it.
How They Work Together
Your query letter is often the first thing writers think to send to an agent—and that’s right! But if you include a completed book proposal along with it, you’re already ahead of the game. Many agents expect to help a new author shape and build a proposal after they’ve signed on, so by preparing one in advance, you’re not only making their job easier, you’re showing them you're serious, prepared, and professional. While the agent may suggest changes to fit their preferences or strategy, bringing a proposal that’s already 90 percent complete speaks volumes about your dedication and readiness.
But a book proposal isn’t just for impressing an agent—it’s a powerful tool for you, too. A strong proposal will help you clarify your vision, sharpen your manuscript, and speak with more confidence and conviction about your book’s message, purpose, and audience. It can even surface gaps or weak spots you hadn’t noticed before. In short, crafting a thoughtful proposal benefits every part of the publishing journey, from pitch to publication.
And if you need help writing either of these? That’s exactly what the KidLit Pitch Kit is for. Coming soon, the KidLit Pitch Kit is a comprehensive resource designed to walk you through every step—no guesswork, no fluff. It’s the kind of resource I wish I had when I was starting out—and it’s coming August 2025.
Join the waitlist now to be the first to hear when it drops.
Writing with you,
Laura + The KidLit Lab Team