Start on the Right Foot
A query letter is like the first phase of a job application. You want to make a good impression so that the agent or editor will give you an opportunity to submit your proposal — the equivalent of a first interview in a job hunt. Normally, there are certain questions every agent and editor expects will be answered in your query letter:
What is the subject and slant for your book?
Why is your book needed?
Who will read your book?
How are you qualified to write the book?
How enthusiastic are you about your book?
How professional is your presentation?
Also, a query letter must include your name, address, telephone number, and e-mail address (if applicable). And if you'd like a response, be sure to include a self-addressed stamped envelope, labeled with your name and address.