I needed advice before I tried to write a novel. The usual axiom — write what you know — wasn't helpful. I spend my days driving my older children to school and changing my younger one's diaper — not exactly best-seller material.

So I turned to experts. Three books gave me invaluable writing advice. One, by a best-selling writer; one, by a top New York agent; and one, by a guy who struggled for years to learn how to write a book and wanted to make it easier for the rest of us.

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