Tid-bits about Query Letters
As you contact an editor about your manuscript one it is imperative that you: Know your target!

§ Study any publication before you submit a query letter.
§ Get writer’s guidelines for the publication if they are available.
§ Study the publication’s masthead to identify the appropriate editor for your query. Do not rely on Writer’s Market. Editors change jobs frequently.
§ You may send the same subject query to more than one publication, as long as they do not compete and you have taken the time to make sure the subject is appropriate for both publications.