23+ Example Of Query Letter For Children's Book Background. A query letter is a short document you submit to agents to outline the important elements of your book, as well as your awareness of the market. The first few times i wrote query letters my stomachache did a fandango.
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Go here to learn more: The first rule of query writing is that the letter must fit on one page. Novelists and most memoirists but don't go into lengthy detail. A novice screenwriter's first line of contact with the powers that be.