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Query letters and book proposals are two related, but distinctly different tools for selling your book. A query letter is a brief "hooky" one-page document that is often sent as a "cold-call," mea...
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Query letters and book proposals are two related, but distinctly different tools for selling your book. A **query letter** is a brief "hooky" one-page document that is often sent as a "cold-call," meaning as your first contact with an agent or publisher you have no previous relationship with. Its purpose is to separate you from the crowd, and to get you a request either for a proposal, an excerpt or a full manuscript. **A proposal** is a longer document that usually contains a complete synopsis, typically broken down into chapters. Other sections vary, but typically include author bio/credentials, comparison works, sample chapters, marketing plan/platform and target audience. It is usually sent only on request (unless the agent or publisher specifies sending it cold). Some agents or publishers want you to send the proposal and the query together, others want the query letter first, and the proposal only if they ask. (In fiction, the proposal is often skipped entirely, in favor of a request for the finished manuscript.) There are plenty of general resources available on [writing good proposals](https://www.huffingtonpost.com/2013/07/10/nonfiction-book-proposal_n_3569043.html) and many publishers or agents will give their own guidelines. Proposals are more associated with the non-fiction market, where books are often sold even before they have been written (if the writer already has a good reputation). But they can also be created for fiction–it's a good exercise to write a proposal for your book because it will help you understand how it will be sold. My general rule is that you can always send just a query first, but that you should also have a proposal all ready in the case it is asked for. (If you are doing fiction, neither the query nor the proposal should be sent until after the manuscript is finished, although, of course, you can write them earlier for your own benefit.)