Send a query letter to a publisher. The letter should begin with an engaging teaser paragraph and also include your qualifications for writing the book, the book's synopsis and the reason you think it would be a good fit with this publisher. The query letter should be carefully edited and thoughtfully written.
Prepare a package to send to interested publishers. The package should include a sample chapter (40-50 pages), a three-page breakdown of the book and a two-page analysis of the market for the book.
Mail these items to the publishers that express interest in the book. Once a publisher has dedicated resources to evaluating your book, you should feel confident about contacting the publisher about any questions or concerns you have about the process.
Respond promptly to any questions or concerns the publisher might have. Some concerns a publisher might have are what kind of audience the book will have and how much further editing is needed. Refer to any successful books that have made similar structural or stylistic choices to your book.