Just noticed this on Amazon.com: Almost 22,000 words, 76 pages, by the wonderfully helpful Noah Lukeman: How to Write a Great Query Letter.

Of course, if you're a writer who you doesn't know who Noah Lukeman is, check out The First Five Pages. It's totally worth it, right up there with Self-Editing for Fiction Writers: How to Edit Yourself Into Print by Rennie Brown and Dave King, which I consider indispensible.

If you're not sure that it's totally worth it, you can get a forty-nine-cent flavor of Lukeman's style with A Dash Of Style: Paragraph and Section Breaks.