Everyone who teaches courses in nonfiction book writing has his or her own favorite guide to recommend, and as soon as I discovered this one, it became mine. Lyon's book differs from others in its extraordinary specificity. She tells you how to write every section of a salable proposal, with details about how to correct common weaknesses and lots of examples and comments on what works, what doesn't, and why. Her headings, boxes, and bulleted lists work well for this subject.Susan K. Perry, author of the bestselling WRITING IN FLOW