
A query letter is a brief one-page letter used as a tool to hook an editor and get them interested in your ideas.
When sending a query letter to a magazine, you are trying to get the editor to buy your ideas and articles.
When you are querying a book publisher, you are, attempting to get an editor interested enough in your opinion on a book proposal or your email manuscript.
Some book editors prefer to receive recommendations on first contact.
Check individual editors for their methods to tailor your query and correctly cover letters.

An essential guide for a query cover letter
limited to one page, single space the editor by their name do not assume the person is a Mr or Miss unless it is evident from the name listed.
For example, if you are contacting a doctor, J Smith does not assume that Mr or Miss should precede DJ; instead, he addressed a letter to D J Smith.
Grab the editor’s attention with a powerful opening of some magazine queries; for instance, begin with a paragraph meant to approximate the lead of the intended article.
Indicate how you intend to develop the article or book of the structure and content of the work.
Let the editor know if you have photos or illustrations to accompany your magazine article.
Mentioning any experience or training that qualifies you to write the article or book; if you’ve been published before, say it. If you haven’t, don’t make things up.
And with a direct request to the article’s writer or if you’re pitching a book as for the go-ahead to send in a full proposal or the entire manuscript. Give the editor an idea of your manuscript’s expected length and delivery date.

Submitting a non-fiction proposal
A cover letter or query letter should be a short introduction to the material included in the proposal.
An overview is a summary of your book if you should detail your book’s subject given an idea of how that subject will be developed.
An outline covers your book chapters by chapter and should be included in all major points covered in each chapter. Some systems are done in a traditional method, but most are written in paragraph forms.
An author’s information sheet this information should be a quaint editor with your writing background I come things her of your qualifications regarding the subject of your book.
Sample chapters many editors like to see sample chapters, especially for a first book. Sample chapters show the editor how you write and develop your ideas from your outline.
Marketing information your book can be successfully marketed is now expected to accompany every book proposal.
If you can provide information about the audience for your book and suggest ways the book publisher can reach these people, you will increase your chances of acceptance.
Competitive title analysis checks the subject guides book in print and other titles on your topic; write one or two sentences synopsis of each and improve upon existing issues.